chore(repo): align gitignore with main

Author: nypdmax

.gitignore

@@ -1,12 +1,6 @@
 .DS_Store
 scratch/
 
-# Local plans and scratch docs (never commit)
-/plans/
-
-# Cursor AI assistant rules (local only)
-/.cursorrules
-
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]