Restructure repository: organize blueprints into folders

Each blueprint now has its own folder containing:
- blueprint.yaml: The automation code with a short header
- README.md: Detailed documentation extracted from headers

Updated CLAUDE.md with repository structure guidelines.

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

Zigbee/MQTT Generic Control/README.md

@@ -0,0 +1,21 @@
+# MQTT Generic Control Blueprint
+
+A flexible blueprint that triggers custom actions based on MQTT messages. Supports up to 8 different action IDs, each with its own callback.
+
+## Features
+
+- Listen to up to 4 MQTT topics simultaneously
+- Map up to 8 action IDs to custom callback actions
+- Works with any Zigbee2MQTT device that sends action payloads
+- Fully customizable actions for each trigger
+
+## How It Works
+
+1. Listens for MQTT messages on configured topics
+2. Extracts the `action` field from the JSON payload
+3. Matches action against configured action IDs
+4. Executes the corresponding callback action sequence
+
+## Author
+
+Alexei Dolgolyov (dolgolyov.alexei@gmail.com)