Stop tracking .claude agent worktree submodules

The previous commit accidentally captured the agent-* worktree
directories as gitlinks. Removes them from the index and adds
.claude/ to .gitignore so future commits don't pick them up again.

Assisted-By: Claude Code

Author: sonus21

.claude/scheduled_tasks.lock

@@ -33,3 +33,4 @@ hs_err_pid*
 /*/log
 
 .DS_Store.claude/
+.claude/