chore: add project config

Mode: YOLO (auto-approve)
Depth: Comprehensive (8-12 phases)
Parallelization: enabled
Workflow agents: research=on, plan_check=on, verifier=on
Model profile: Budget (Haiku where possible)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

.planning/config.json

@@ -0,0 +1,12 @@
+{
+  "mode": "yolo",
+  "depth": "comprehensive",
+  "parallelization": true,
+  "commit_docs": true,
+  "model_profile": "budget",
+  "workflow": {
+    "research": true,
+    "plan_check": true,
+    "verifier": true
+  }
+}