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 Light Control/README.md

@@ -0,0 +1,22 @@
+# MQTT Light Control Blueprint
+
+Provides extended light control functionality via MQTT devices (typically Zigbee controllers through zigbee2mqtt).
+
+## Features
+
+- Control multiple lights via MQTT topics
+- Sequential and "all at once" turn on/off actions
+- Brightness control (increment, hold, list-based, min/max)
+- Color temperature control (increment, hold, list-based)
+- RGB/Hue control (increment, hold, list-based)
+- Preset list support (JSON format) for quick scene switching
+- Scene activation support (up to 4 scenes)
+- Light group and area targeting
+- Configurable transition duration for smooth changes
+- Alternative light support (control secondary lights when primary are off)
+- Persistent state storage via input_text entity
+- Custom action callbacks for extending functionality
+
+## Author
+
+Alexei Dolgolyov (dolgolyov.alexei@gmail.com)