Release v1.2.0 - Tab bar improvements and scroll position tracking

Update icons and fix CLI installation path

- Add new icon assets for all platforms (icns, ico, png)
- Fix CLI installation script path issue
- Add debug logging for CLI installation
- Remove notarize script reference for unsigned builds
- Prepare for v1.1.0 release

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Release v1.1.0 - Natural Text-to-Speech with KittenTTS

Add release automation and documentation

- Add GitHub Actions workflow for automated releases
- Update electron-builder for unsigned builds (no notarization)
- Add detailed installation instructions
- Add changelog for version tracking
- Add release script for manual builds
- Update README with security notes about unsigned app
- Disable hardened runtime for easier distribution