Updated project licence to BSD3CC and import Index through Composer.

composer.json

@@ -1,15 +1,22 @@
 {
+    "minimum-stability": "dev",
+    "prefer-stable": true,
     "require": {
+        "flashwave/index": "dev-master",
         "twig/twig": "^3.0",
         "erusev/parsedown": "~1.6",
         "chillerlan/php-qrcode": "^4.3",
         "symfony/mailer": "^6.0",
-        "matomo/device-detector": "^6.1"
+        "matomo/device-detector": "^6.1",
+        "wikimedia/composer-merge-plugin": "^2.1"
     },
     "autoload": {
         "classmap": [
             "database"
-        ]
+        ],
+        "psr-4": {
+            "Misuzu\\": "src"
+        }
     },
     "scripts": {
         "post-install-cmd": [
@@ -20,7 +27,17 @@
     "config": {
         "preferred-install": "dist",
         "allow-plugins": {
-            "composer/installers": true
+            "composer/installers": true,
+            "wikimedia/composer-merge-plugin": true
+        }
+    },
+    "extra": {
+        "merge-plugin": {
+            "include": [
+                "composer.local.json"
+            ],
+            "recurse": true,
+            "replace": true
         }
     }
 }