Click Git v0.5.0

Adds folder-scoped stash support.\n\nHighlights:\n- New Click Git: Stash Folder command.\n- Uses git stash push -u -- , so it stashes tracked and untracked changes under the selected folder.\n- Keeps outside-folder changes in the working tree.\n- Conservative scope: this version only creates stashes and does not apply, pop, drop, or list stashes.\n\nQuality gates:\n- npm run check passed.\n\nArtifact:\n- click-git-0.5.0-20260706-011545.vsix\n- SHA256: 241A0DB04FFFB1152DF2667D2CC66CBBE9DAA14580651376194D15C65926557F