ci: add GitHub Release with zip on tag push

- Package app as .zip for Homebrew Cask compatibility
- Auto-create GitHub Release with gh CLI on v* tags
- Upload zip as both artifact and release asset

Author: cnfatal

.github/workflows/build.yml

@@ -3,6 +3,7 @@ name: Build
 on:
   push:
     branches: [main]
+    tags: ["v*"]
   pull_request:
     branches: [main]
   workflow_dispatch:
@@ -27,12 +28,25 @@ jobs:
             CODE_SIGNING_ALLOWED=NO
 
       - name: Export app
+        if: startsWith(github.ref, 'refs/tags/v')
         run: |
           cp -R "${{ runner.temp }}/NetworkStatusBar.xcarchive/Products/Applications/NetworkStatusBar.app" \
             "${{ runner.temp }}/NetworkStatusBar.app"
+          cd "${{ runner.temp }}" && zip -r NetworkStatusBar.zip NetworkStatusBar.app
 
       - name: Upload artifact
+        if: startsWith(github.ref, 'refs/tags/v')
         uses: actions/upload-artifact@v4
         with:
           name: NetworkStatusBar
-          path: ${{ runner.temp }}/NetworkStatusBar.app
+          path: ${{ runner.temp }}/NetworkStatusBar.zip
+
+      - name: Create GitHub Release
+        if: startsWith(github.ref, 'refs/tags/v')
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release create "${{ github.ref_name }}" \
+            "${{ runner.temp }}/NetworkStatusBar.zip" \
+            --title "${{ github.ref_name }}" \
+            --generate-notes