docs: Add Homebrew installation instructions

Add Homebrew installation as the recommended method and reorganize
other installation options with clear section headers. Include link to
the latest GitHub release for direct binary downloads and add version
flag to the CLI options documentation.

Author: epilande

README.md

@@ -32,11 +32,24 @@ to your clipboard, ready for LLM processing.
 
 ## 📦 Installation
 
+### Homebrew
+
+```sh
+brew tap epilande/tap
+brew install codegrab
+```
+
+### Go Install
+
 ```sh
 go install github.com/epilande/codegrab/cmd/grab@latest
 ```
 
-Or build from source:
+### Binary Download
+
+Download the [latest release](https://github.com/epilande/codegrab/releases/latest) for your platform.
+
+### Build from Source
 
 ```sh
 git clone https://github.com/epilande/codegrab
@@ -79,6 +92,7 @@ grab [options] [directory]
 | Option                  | Description                                                                             |
 | :---------------------- | :-------------------------------------------------------------------------------------- |
 | `-h, --help`            | Display help information                                                                |
+| `-v, --version`         | Display version information                                                             |
 | `-n, --non-interactive` | Run in non-interactive mode (grabs all files)                                           |
 | `-o, --output file`     | Output file path (default: `./codegrab-output.<format>`)                                |
 | `-t, --temp`            | Use system temporary directory for output file                                          |