📝 Add comparison table to documentation

Add a comparison table between Committed and Gitmoji CLI. This
comparison highlights the missing features for Committed and will act as
a roadmap for future functionality.

As part of this change, the checkmarks and crosses were updated in other
parts of the documnetation to match the comparison table. These new
images are external instead of emojis and provide a more stylish design.

README.md

@@ -94,10 +94,10 @@ correctly it will not be possible to apply a commit.
 
 To make these changes following the instructions below.
 
-| Terminal       | Setting                                                      |
-| :------------- | :----------------------------------------------------------- |
+| Terminal       | Setting                                                                                                 |
+|:---------------|:--------------------------------------------------------------------------------------------------------|
 | macOS Terminal | `Profiles` `Keyboard`<br />![macOS Terminal Keyboard Setting](docs/keyboard-options-macos-terminal.png) |
-| iTerm2         | `Preferences` `Profile` `Keys`<br />![iTerm2 Keyboard Setting](docs/keyboard-options-iterm2.png) |
+| iTerm2         | `Preferences` `Profile` `Keys`<br />![iTerm2 Keyboard Setting](docs/keyboard-options-iterm2.png)        |
 
 The alternative keyboard shortcut  <kbd>⌥ Option</kbd> + <kbd>\\</kbd> can also be used to apply
 a commit.
@@ -110,16 +110,16 @@ with terminals. The following list are the terminals that have been tested.
 Other terminals may display correctly and feedback would be appreciated to help
 update the list.
 
-| Terminal       | Status | Notes                              |
-| :------------- | :----- | :--------------------------------- |
-| macOS Terminal | ✅      |                                    |
-| iTerm2         | ✅      |                                    |
-| VS Code        | ✅      |                                    |
-| Hyper          | ✅      |                                    |
-| Alacritty      | ✅      |                                    |
-| WezTerm        | ✅      |                                    |
-| ttyd           | ✅      | Requires compatibility option set. |
-| kitty          | ✅      | Requires compatibility option set. |
+| Terminal       | Status                              | Notes                              |
+|:---------------|:------------------------------------|:-----------------------------------|
+| macOS Terminal | ![✅](docs/assets/confirm-24x24.svg) |                                    |
+| iTerm2         | ![✅](docs/assets/confirm-24x24.svg) |                                    |
+| VS Code        | ![✅](docs/assets/confirm-24x24.svg) |                                    |
+| Hyper          | ![✅](docs/assets/confirm-24x24.svg) |                                    |
+| Alacritty      | ![✅](docs/assets/confirm-24x24.svg) |                                    |
+| WezTerm        | ![✅](docs/assets/confirm-24x24.svg) |                                    |
+| ttyd           | ![✅](docs/assets/confirm-24x24.svg) | Requires compatibility option set. |
+| kitty          | ![✅](docs/assets/confirm-24x24.svg) | Requires compatibility option set. |
 
 ## 💾 Installation [⭡](#committed)
 
@@ -129,7 +129,7 @@ Install Committed with Homebrew.
 brew install mikelorant/taps/committed
 ```
 
-## 🎛 Usage [⭡](#committed)
+## ⚙ Usage [⭡](#committed)
 
 ```text
 Committed is a WYSIWYG Git commit editor
@@ -180,7 +180,7 @@ Flags:
       --uninstall   Uninstall Git hook
 ```
 
-## ⚙ Configuration [⭡](#committed)
+## 🎛 Configuration [⭡](#committed)
 
 No configuration is necessary however there are some values that can be changed
 based on preference.
@@ -261,20 +261,20 @@ The first theme of each set is the default theme applied.
 
 #### Dark Themes
 
-| Name                                                         | ID                             |
-| :----------------------------------------------------------- | :----------------------------- |
-| Builtin Dark                                                 | builtin_dark                   |
-| [Dracula](https://draculatheme.com/)                         | dracula                        |
-| [Gruvbox Dark](https://github.com/morhetz/gruvbox)           | gruvbox_dark                   |
-| [Nord](https://www.nordtheme.com/)                           | nord                           |
-| [Retrowave](https://github.com/juanmnl/vs-1984)              | retrowave                      |
+| Name                                                                     | ID                             |
+|:-------------------------------------------------------------------------|:-------------------------------|
+| Builtin Dark                                                             | builtin_dark                   |
+| [Dracula](https://draculatheme.com/)                                     | dracula                        |
+| [Gruvbox Dark](https://github.com/morhetz/gruvbox)                       | gruvbox_dark                   |
+| [Nord](https://www.nordtheme.com/)                                       | nord                           |
+| [Retrowave](https://github.com/juanmnl/vs-1984)                          | retrowave                      |
 | [Solarized Dark Higher Contrast](https://ethanschoonover.com/solarized/) | solarized_dark_higher_contrast |
-| [Tokyo Night](https://github.com/enkia/tokyo-night-vscode-theme) | tokyo_night                    |
+| [Tokyo Night](https://github.com/enkia/tokyo-night-vscode-theme)         | tokyo_night                    |
 
 #### Light Theme
 
 | Name                                                                      | ID                      |
-| :------------------------------------------------------------------------ | :---------------------- |
+|:--------------------------------------------------------------------------|:------------------------|
 | Builtin Light                                                             | builtin_light           |
 | [Builtin Solarized Light](https://ethanschoonover.com/solarized/)         | builtin_solarized_light |
 | [Builtin Tango Light](http://tango.freedesktop.org/Tango_Desktop_Project) | builtin_tango_light     |
@@ -330,7 +330,7 @@ Related links:
 The global shortcuts can be used within any view.
 
 | Key Binding                              | Command            |
-| :--------------------------------------- | :----------------- |
+|:-----------------------------------------|:-------------------|
 | <kbd>⌥ Option</kbd> + <kbd>⏎ Enter</kbd> | Commit             |
 | <kbd>⌥ Option</kbd> + <kbd>\\</kbd>      | Commit             |
 | <kbd>⌥ Option</kbd> + <kbd>S</kbd>       | Toggle sign-off    |
@@ -347,7 +347,7 @@ The global shortcuts can be used within any view.
 The emoji shortcuts are limited to the emoji view only.
 
 | Key Binding            | Command       |
-| :--------------------- | :------------ |
+|:-----------------------|:--------------|
 | <kbd>⌫ Delete</kbd>    | Clear emoji   |
 | <kbd>⎋ Escape</kbd>    | Reset filter  |
 | <kbd>⇟ Page Down</kbd> | Next page     |
@@ -426,6 +426,35 @@ with using Git as an editor.
 - Summary will be truncated if more than 72 characters.
 - Lines will not reflow when editing the body.
 
+## ⚖️ Comparison
+
+### Git Functions
+
+| Feature                      | Committed                           | Gitmoji CLI                            |
+|:-----------------------------|:------------------------------------|:---------------------------------------|
+| Git hooks                    | ![✅](docs/assets/confirm-24x24.svg) | ![✅](docs/assets/confirm-24x24.svg)    |
+| Git editor replacement       | ![✅](docs/assets/confirm-24x24.svg) | ![❌](docs/assets/cancel-24x24.svg)     |
+| Amend commit                 | ![✅](docs/assets/confirm-24x24.svg) | ![❌](docs/assets/cancel-24x24.svg)     |
+| Add files                    | ![❌](docs/assets/cancel-24x24.svg)  | ![✅](docs/assets/confirm-24x24.svg)    |
+| Signed commits               | ![❌](docs/assets/cancel-24x24.svg)  | ![✅](docs/assets/confirm-24x24.svg)    |
+| Sign-off commits             | ![✅](docs/assets/confirm-24x24.svg) | ![❌](docs/assets/cancel-24x24.svg)     |
+| Switch author                | ![✅](docs/assets/confirm-24x24.svg) | ![❌](docs/assets/cancel-24x24.svg)     |
+| Save and load failed commits | ![✅](docs/assets/confirm-24x24.svg) | ![❌](docs/assets/cancel-24x24.svg)[^1] |
+
+[^1]: [Print Git command on failure](https://github.com/carloscuesta/gitmoji-cli/pull/681).
+
+### Visual Style
+
+| Feature                 | Committed                           | Gitmoji CLI                         |
+|:------------------------|:------------------------------------|:------------------------------------|
+| Subject counter         | ![✅](docs/assets/confirm-24x24.svg) | ![✅](docs/assets/confirm-24x24.svg) |
+| Custom emojis           | ![❌](docs/assets/cancel-24x24.svg)  | ![✅](docs/assets/confirm-24x24.svg) |
+| Mulitple emoji profiles | ![✅](docs/assets/confirm-24x24.svg) | ![❌](docs/assets/cancel-24x24.svg)  |
+| Multiline editor        | ![✅](docs/assets/confirm-24x24.svg) | ![❌](docs/assets/cancel-24x24.svg)  |
+| Scope prompt            | ![❌](docs/assets/cancel-24x24.svg)  | ![✅](docs/assets/confirm-24x24.svg) |
+| Themes                  | ![✅](docs/assets/confirm-24x24.svg) | ![❌](docs/assets/cancel-24x24.svg)  |
+| Hard wrap body width    | ![✅](docs/assets/confirm-24x24.svg) | ![❌](docs/assets/cancel-24x24.svg)  |
+
 ## ✏️ Authors [⭡](#committed)
 
 - [@mikelorant](https://www.github.com/mikelorant)