Reorganize .gitignore — group local-only notes patterns

Author: bilouro

.gitignore

@@ -31,8 +31,7 @@ Thumbs.db
 site/
 site/
 
-# Internal notes (not for the repo)
+# Local-only working notes
 eupago-duvidas.md
-
-# Working file for AI assistants — local only
-CLAUDE.md
+*.local.md
+CLAUDE.*