Add Files mapper and dto. Also add service on FilesystemEntitiesTrait

Author: rwhite27

composer.json

@@ -15,7 +15,8 @@
         "guzzlehttp/guzzle": "^6.5",
         "baka/http": "^0.5",
         "baka/router": "^0.1@dev",
-        "vlucas/phpdotenv": "^2.4"
+        "vlucas/phpdotenv": "^2.4",
+        "mark-gerarts/auto-mapper-plus": "2.0.0-alpha1"
     },
     "require-dev": {
         "phpunit/phpunit" : ">=7.0",