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/http_example.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+"""
+HTTP Example Action - Python Example Pack
+
+Demonstrates using the `requests` library to make an HTTP call to example.com.
+Receives parameters via stdin JSON (through the Python wrapper).
+"""
+
+import requests
+
+
+def run(url="https://example.com", **kwargs):
+    """Fetch a URL and return status and a snippet of the response body."""
+    response = requests.get(url, timeout=10)
+
+    return {
+        "status_code": response.status_code,
+        "url": response.url,
+        "content_length": len(response.text),
+        "snippet": response.text[:500],
+        "success": response.ok,
+    }