Add additional configuration and utility files

- Add install script and message configuration
- Add settings controller and templates
- Add ESP-NOW message utility
- Update API documentation

msg.json

@@ -0,0 +1,23 @@
+{
+    "g":{ 
+        "df": {
+            "pt": "on",
+            "cl": ["#ff0000"],
+            "br": 200,
+            "n1": 10,
+            "n2": 10,
+            "n3": 10,
+            "n4": 10,
+            "n5": 10,
+            "n6": 10,
+            "dl": 100
+        },
+        "dj": {
+            "pt": "blink",
+            "cl": ["#00ff00"],
+            "dl": 500
+        }
+    },
+    "sv": true,
+    "st": 0
+}