Initial commit: Python Example Pack for Attune

Includes:
- 3 Python actions (hello, http_example, read_counter)
- 1 counter trigger type
- 1 counter sensor (Python, keystore-backed, per-rule state)
- 1 example rule (count_and_log)
- requirements.txt with requests and pika
- README with full usage documentation

actions/hello.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+"""
+Hello Action - Python Example Pack
+
+A minimal Python action that returns "Hello, Python".
+Demonstrates the basic structure of a Python action in Attune.
+"""
+
+import json
+import sys
+
+
+def run(**kwargs):
+    """Return a simple greeting message."""
+    return {"message": "Hello, Python"}
+
+
+if __name__ == "__main__":
+    result = run()
+    print(json.dumps({"result": result, "status": "success"}))
+    sys.exit(0)