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 Button Control/README.md

@@ -0,0 +1,22 @@
+# MQTT Button Control Blueprint
+
+Controls lights and switches using Zigbee2MQTT button devices with multiple action mappings.
+
+## Features
+
+- Map multiple action IDs to different lights/switches
+- Supports light, switch, and input_boolean entities
+- Visual feedback via blink indication when pressing already-active light
+- Tracks last interacted entity in an input_text helper
+- Supports multiple MQTT topics (multiple buttons)
+
+## How It Works
+
+1. Receives MQTT messages with action IDs from Zigbee buttons
+2. Maps action ID to corresponding entity by index position
+3. Toggles the matched entity (light/switch/input_boolean)
+4. Optionally blinks light if it's already on (idle timeout feature)
+
+## Author
+
+Alexei Dolgolyov (dolgolyov.alexei@gmail.com)