docs(README): update README

.vscode/extensions.json

@@ -0,0 +1,12 @@
+{
+  "recommendations": [
+    "EditorConfig.EditorConfig",
+    "yzhang.markdown-all-in-one",
+    "foxundermoon.shell-format",
+    "timonwong.shellcheck",
+    "streetsidesoftware.code-spell-checker",
+    "jetmartin.bats",
+    "redhat.vscode-yaml",
+  ],
+  "unwantedRecommendations": []
+}

.vscode/settings.json

@@ -0,0 +1,4 @@
+{
+  "cloudcode.yaml.format.singleQuote": true,
+  "yaml.format.singleQuote": true
+}

README.md

@@ -1,22 +1,70 @@
-# asdf-gitui
+# asdf-gitui <!-- omit in toc -->
 
-![AllInOne](https://github.com/looztra/asdf-gitui/workflows/AllInOne/badge.svg)
+[![Build](https://github.com/looztra/asdf-gitui/actions/workflows/code_checks.yml/badge.svg)](https://github.com/looztra/asdf-gitui/actions/workflows/code_checks.yml)
+[![Build](https://github.com/looztra/asdf-gitui/actions/workflows/workflows_checks.yml/badge.svg)](https://github.com/looztra/asdf-gitui/actions/workflows/workflows_checks.yml)
 [![GitHub license](https://img.shields.io/github/license/looztra/asdf-gitui?style=plastic)](https://github.com/looztra/asdf-gitui/blob/master/LICENSE)
 
+[gitui](https://github.com/extrawurst/gitui) plugin for the [asdf version manager](https://asdf-vm.com).
+
+## Contents
+
+- [Contents](#contents)
+- [Build History](#build-history)
+- [Dependencies](#dependencies)
+- [Install](#install)
+  - [add the plugin](#add-the-plugin)
+  - [install gitui](#install-gitui)
+- [Contributing](#contributing)
+- [License](#license)
+
 ## Build History
 
-[![Build history](https://buildstats.info/github/chart/looztra/asdf-gitui?branch=master)](https://github.com/looztra/asdf-gitui/actions)
+[![Build history](https://buildstats.info/github/chart/looztra/asdf-gitui?branch=main)](https://github.com/looztra/asdf-gitui/actions)
 
-## gitui
+## Dependencies
 
-<https://github.com/extrawurst/gitui>
+- `bash`, `curl`, and [POSIX utilities](https://pubs.opengroup.org/onlinepubs/9699919799/idx/utilities.html).
+- a python 3 runtime (provided through [asdf-python](https://github.com/asdf-community/asdf-python) or not)
 
 ## Install
 
-```bash
-asdf plugin-add gitui https://github.com/looztra/asdf-gitui
+### add the plugin
+
+```shell
+asdf plugin add gitui
 ```
 
-## Use
+Or:
+
+```shell
+asdf plugin add copier https://github.com/looztra/asdf-copier.git
+```
+
+### install gitui
+
+```shell
+# Show all installable versions
+asdf list all gitui
+
+# Install latest version
+asdf install gitui latest
+
+# Set a version globally (on your ~/.tool-versions file)
+asdf global gitui latest
+
+# Now copier commands are available
+gitui --help
+```
+
+Check [asdf](https://github.com/asdf-vm/asdf) readme for more instructions on how to
+install & manage versions.
+
+## Contributing
+
+Contributions of any kind welcome! See the [contributing guide](contributing.md).
+
+[Thanks goes to these contributors](https://github.com/looztra/asdf-gitui/graphs/contributors)!
+
+## License
 
-Check out the [asdf](https://github.com/asdf-vm/asdf) readme for instructions on how to install and manage versions of gitui.
+See [LICENSE](LICENSE) © [Christophe Furmaniak](https://github.com/looztra/)