fix: remove stray worktree gitlinks and ignore .claude/worktrees

Author: selemondev

.gitignore

@@ -120,4 +120,6 @@ docs/.vitepress/dist
 docs/.vitepress/cache
 
 # Agent skills (materialized from skills-lock.json; the lock file is the source of truth)
-.agents/
+.agents/
+# Claude Code worktrees
+.claude/worktrees/