MrRSS

### Added

- Added a downloadable Codex skill package for operating MrRSS through the local API.

### Fixed

- Fixed Linux release builds by upgrading Wails v3 to the latest alpha and installing GTK4/WebKitGTK 6.0 build dependencies.
- Fixed sidebar scrollbars so they stay hidden until the sidebar is hovered or focused. (#465)
- Fixed summary card layout jumps by reserving space before automatic summary generation starts. (#654)
- Fixed the image gallery "view article" action so it opens the selected article in the regular reader. (#572)
- Fixed image-mode feeds and categories switching regular article views into the image gallery. (#568)
- Added a shortcut from the article feed name back to that feed in the regular article list. (#561)
- Added per-article reading position restoration when reopening articles. (#445)

### Changed

- Updated release automation to publish `MrRSS--skills.zip` as a release asset.