chore: stop tracking planning artifacts

Author: PatrickSys

.gitignore

@@ -19,7 +19,7 @@ nul
 .claude
 .codebase-intelligence.json
 .cursor/
-.planning/*
+.planning/
 .planning-archive/*
 .codex/
 grammars/*.wasm
@@ -28,4 +28,4 @@ grammars/*.wasm
 docs/visuals.md
 .repolore/
 .opencode/
-.agents/
+.agents/