Add claude-code-source-code and claw-code directories

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

claw-code/src/costHook.py

@@ -0,0 +1,8 @@
+from __future__ import annotations
+
+from .cost_tracker import CostTracker
+
+
+def apply_cost_hook(tracker: CostTracker, label: str, units: int) -> CostTracker:
+    tracker.record(label, units)
+    return tracker