fix: Add ad-hoc code signing for macOS builds

- Configure APPLE_SIGNING_IDENTITY to '-' for macOS builds
- Enables ad-hoc signing to prevent 'app is damaged' error
- Users can now open the app with right-click > Open
- Resolves Gatekeeper quarantine issue on macOS

Author: loan-talvat

.github/workflows/release.yml

@@ -81,6 +81,7 @@ jobs:
       - uses: tauri-apps/tauri-action@v0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          APPLE_SIGNING_IDENTITY: ${{ matrix.platform == 'macos-latest' && '-' || '' }}
         with:
           releaseId: ${{ needs.create-release.outputs.release_id }}
           args: ${{ matrix.args }}