meta: gitignore local worktree directories

The repo ignores .claude/worktrees but not .worktrees, which was only excluded through .git/info/exclude on one machine. Bulk-commit scripts sweep untracked state into commits, and a worktree directory lands as a broken gitlink submodule ref.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V8c42WVrFL5vMfsonTeT2J

Author: ClaydeCode

.gitignore

@@ -3,6 +3,7 @@ public
 .idea
 
 .claude/worktrees
+.worktrees
 
 venv
 .venv