chore: gitignore .worktrees and drop accidental worktree commits

Co-Authored-By: Claude <noreply@anthropic.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: 3 people

.gitignore

@@ -24,3 +24,4 @@ test-scripts/.install-test/
 
 # Claude Code temporary worktrees
 .claude/worktrees/
+.worktrees/