feat: add script to read and parse transcript jsonl steps

scripts/read_step.py

@@ -0,0 +1,11 @@
+import json
+
+with open(r"C:\Users\Snarf\.gemini\antigravity\brain\67541ce0-c72c-4983-b7f8-7f29d818f6c0\.system_generated\logs\transcript.jsonl", "r", encoding="utf-8") as f:
+    for line in f:
+        data = json.loads(line)
+        idx = data.get("step_index", 0)
+        if 1970 <= idx <= 2010 and data.get("source") == "MODEL" and data.get("type") == "PLANNER_RESPONSE":
+            content = data.get("content")
+            if content:
+                print(f"=== Step {idx} ===")
+                print(content[:800])