feat: add Homebrew tap and installation instructions (#7)

- Create Homebrew tap at greysquirr3l/homebrew-shadowforge
- Add Homebrew installation to README (brew tap + install)
- Add binary download instructions with example
- Update Homebrew docs with tap repo link and status
- Update formula template version example to 0.7.6

Users can now install with:
  brew tap greysquirr3l/shadowforge
  brew install shadowforge

Author: greysquirr3l

README.md

@@ -235,13 +235,37 @@ Complete documentation available in [`docs/public/cli/`](docs/public/cli/):
 **Status**: CLI application is fully functional with 7 production-ready steganography
 techniques and all 4 distribution patterns.
 
-### Prerequisites
+### Homebrew (macOS/Linux)
 
-- Go 1.21 or higher
-- Git
+```bash
+brew tap greysquirr3l/shadowforge
+brew install shadowforge
+```
+
+### Download Binary
+
+Download pre-built binaries from [GitHub Releases](https://github.com/greysquirr3l/shadowforge/releases/latest):
+
+- macOS (Intel): `shadowforge_*_darwin_amd64.tar.gz`
+- macOS (Apple Silicon): `shadowforge_*_darwin_arm64.tar.gz`
+- Linux (x64): `shadowforge_*_linux_amd64.tar.gz`
+- Linux (ARM64): `shadowforge_*_linux_arm64.tar.gz`
+
+```bash
+# Example: Install on macOS Apple Silicon
+VERSION=0.7.6
+curl -L -O https://github.com/greysquirr3l/shadowforge/releases/download/v${VERSION}/shadowforge_${VERSION}_darwin_arm64.tar.gz
+tar -xzf shadowforge_${VERSION}_darwin_arm64.tar.gz
+sudo mv shadowforge_${VERSION}_darwin_arm64/shadowforge /usr/local/bin/
+shadowforge version
+```
 
 ### From Source
 
+**Prerequisites**: Go 1.21 or higher, Git
+
+### Build from Source
+
 ```bash
 # Clone the repository
 git clone https://github.com/greysquirr3l/shadowforge.git

docs/homebrew/README.md

@@ -1,6 +1,23 @@
 # Homebrew Distribution (shadowforge)
 
-This project is a CLI tool, so Homebrew distribution should use a **formula** (not a cask).
+✅ **Status**: Homebrew tap is live at [greysquirr3l/homebrew-shadowforge](https://github.com/greysquirr3l/homebrew-shadowforge)
+
+This project is a CLI tool, so Homebrew distribution uses a **formula** (not a cask).
+
+## User Installation
+
+Users can install shadowforge via Homebrew:
+
+```bash
+brew tap greysquirr3l/shadowforge
+brew install shadowforge
+```
+
+## Tap Repository
+
+The tap lives at: https://github.com/greysquirr3l/homebrew-shadowforge
+
+Formula location: `Formula/shadowforge.rb`
 
 ## Release Assets
 

docs/homebrew/shadowforge.rb

@@ -13,7 +13,7 @@ class Shadowforge < Formula
   license "Apache-2.0"
 
   # Example:
-  # version "0.6.0"
+  # version "0.7.6"
   version "0.0.0"
 
   on_macos do