Add pattern definitions endpoint

- Add /definitions endpoint to pattern controller
- Load pattern.json with fallback paths for local dev and MicroPython

src/controllers/pattern.py

@@ -1,10 +1,32 @@
 from microdot import Microdot
 from models.pattern import Pattern
 import json
+import sys
 
 controller = Microdot()
 patterns = Pattern()
 
+def load_pattern_definitions():
+    """Load pattern definitions from pattern.json file."""
+    try:
+        # Try different paths for local development vs MicroPython
+        paths = ['db/pattern.json', 'pattern.json', '/db/pattern.json']
+        for path in paths:
+            try:
+                with open(path, 'r') as f:
+                    return json.load(f)
+            except OSError:
+                continue
+        return {}
+    except Exception as e:
+        print(f"Error loading pattern.json: {e}")
+        return {}
+
+@controller.get('/definitions')
+async def get_pattern_definitions(request):
+    """Get pattern definitions from pattern.json."""
+    definitions = load_pattern_definitions()
+    return json.dumps(definitions), 200, {'Content-Type': 'application/json'}
 
 @controller.get('')
 async def list_patterns(request):