Add tag colors config example

- Configure per-tag LED colors and effects (pulse/flash/solid)
- All effects sync across all 3 portal pads
- Includes preset colors reference

tag_colors.json.example

@@ -0,0 +1,47 @@
+{
+    "_comment": "Tag color mappings for LEGO Dimensions Portal Client",
+    "_instructions": [
+        "Map legacy keys to colors and effects",
+        "Effects: 'solid', 'pulse', 'flash'",
+        "Colors: [R, G, B] values 0-255",
+        "Run the portal client to discover tag legacy keys"
+    ],
+    
+    "default": {
+        "color": [0, 255, 255],
+        "effect": "solid",
+        "name": "Default"
+    },
+    
+    "tags": {
+        "2168494570": {
+            "color": [255, 180, 50],
+            "effect": "pulse",
+            "name": "Desert Theme"
+        },
+        "2151706826": {
+            "color": [0, 255, 100],
+            "effect": "solid",
+            "name": "Forest Theme"
+        }
+    },
+    
+    "_preset_colors": {
+        "_comment": "Reference colors you can copy/paste",
+        "red": [255, 0, 0],
+        "green": [0, 255, 0],
+        "blue": [0, 0, 255],
+        "white": [255, 255, 255],
+        "yellow": [255, 255, 0],
+        "cyan": [0, 255, 255],
+        "magenta": [255, 0, 255],
+        "orange": [255, 128, 0],
+        "purple": [128, 0, 255],
+        "pink": [255, 105, 180],
+        "desert_yellow": [255, 180, 50],
+        "forest_green": [0, 255, 100],
+        "ocean_blue": [0, 100, 255],
+        "fire_red": [255, 50, 0],
+        "ice_blue": [150, 200, 255]
+    }
+}