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/Media Knob Control/README.md

@@ -0,0 +1,23 @@
+# MQTT Knob Media Controller Blueprint
+
+Controls a media player using an MQTT-connected rotary encoder/knob.
+
+## Features
+
+- Play/Pause toggle (button press)
+- Volume up/down (rotation)
+- Mute toggle (optional)
+- Next/Previous track (optional)
+
+## Volume Step Behavior
+
+- If your device sends `action_step_size` in the MQTT payload, it will be used
+- Otherwise, the configured default step size is applied
+
+## Configuration
+
+Action IDs can be customized to match your specific MQTT device.
+
+## Author
+
+Alexei Dolgolyov (dolgolyov.alexei@gmail.com)