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>

Common/Refrigerator/README.md

@@ -0,0 +1,21 @@
+# Refrigerator Express Mode Control Blueprint
+
+This blueprint monitors refrigerator temperature and automatically enables express/turbo cooling mode when the temperature drifts too far from target.
+
+## How It Works
+
+- Monitors the temperature sensor and compares to target temperature
+- If difference exceeds threshold (and door is closed), enables express mode
+- Sends notification when express mode is activated
+- Automatically disables express mode when temperature normalizes
+
+## Requirements
+
+- Door sensor (binary_sensor) to detect if door is open
+- Temperature sensor reporting current fridge temperature
+- Climate entity with target temperature attribute
+- Switch entity to control express/turbo mode
+
+## Author
+
+Alexei Dolgolyov (dolgolyov.alexei@gmail.com)