Add more info in README.md and Cargo.toml

Cargo.toml

@@ -1,7 +1,16 @@
 [package]
 name = "hexrw"
 version = "0.1.0"
+description = "A CLI utility to read / write hexadecimal value from / to a file"
+authors = ["Philip Ye <[email protected]>"]
 edition = "2021"
+license-file = "LICENSE"
+categories = ["command-line-utilities"]
+keywords = ["hex", "hexadecimal"]
+repository = "https://github.com/yestyle/hexrw"
+homepage = "https://github.com/yestyle/hexrw"
+documentation = "https://github.com/yestyle/hexrw"
+readme = "README.md"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

README.md

@@ -1 +1,21 @@
-# hexrw
+# hexrw
+
+A CLI utility to read / write hexadecimal value from / to a file.
+
+# Install
+
+Use the following command to install `hexrw` executable to `~/.cargo/bin` directory:
+
+```
+cargo install hexrw
+```
+
+# Usage
+
+```
+hexrw [-w <write>] [-r <read>] [-d <delay>] <file>
+```
+
+# License
+
+This project is licensed under [MIT license](LICENSE).