Update packaging.md

updating the readme file for installation of apidash using homebrew

Author: Mrudul111

doc/dev_guide/packaging.md

@@ -21,8 +21,61 @@ TODO Instructions
 TODO Instructions
 
 ## Homebrew
-
-TODO Instructions
+# apidash Homebrew Formula Submission
+
+## 1. Prepare Tap Repository
+```
+# Create Homebrew tap
+gh repo create homebrew-tap --public --clone
+mkdir -p homebrew-tap/Formula
+cd homebrew-tap
+```
+
+## 2. Package apidash
+```
+# Build macOS bundle
+flutter build macos
+
+# Create versioned tarball
+tar -czvf apidash-v1.0.0.tar.gz \
+  -C build/macos/Build/Products/Release/ \
+  Apidash.app
+
+# Generate SHA256 checksum
+shasum -a 256 apidash-v1.0.0.tar.gz
+```
+
+## 3. Create Formula File
+`Formula/apidash.rb`:
+```
+class Apidash < Formula
+  desc "Modern API dashboard for developers"
+  homepage "https://apidash.dev"
+  url "https://github.com/<user>/<repo>/releases/download/v1.0.0/apidash-v1.0.0.tar.gz"
+  sha256 "PASTE_YOUR_SHA256_HERE"
+
+  def install
+    prefix.install "Apidash.app"
+    bin.write_exec_script prefix/"Apidash.app/Contents/MacOS/Apidash"
+  end
+
+  test do
+    system "#{bin}/Apidash", "--version"
+  end
+end
+```
+
+## 4. Local Validation
+```
+# Check formula syntax
+brew audit --strict Formula/apidash.rb
+
+# Test installation
+brew install --build-from-source Formula/apidash.rb
+
+# Verify execution
+brew test apidash
+```
 
 ## Chocolatey