Add Third Party API Field to server metadata (#98)

Author: Moose1301

mappings/metadata.example.json

@@ -28,5 +28,8 @@
     "website": "https://goldenpvp.net",
     "socials": {
         "twitter": "GoldenPvPNet"
-    }
+    },
+    "thirdPartyAPIs": [
+        "Apollo"
+    ]
 }

mappings/metadata.schema.json

@@ -118,6 +118,13 @@
                     "type": "string"
                 }
             }
+        },
+        "thirdPartyAPIs": {
+            "type": "array",
+            "uniqueItems": true,
+            "items": {
+                "$ref": "#/definitions/ThirdPartyAPI"
+            }
         }
     },
     "definitions": {
@@ -202,6 +209,12 @@
                 "Roleplay",
                 "Adventure"
             ]
+        },
+        "ThirdPartyAPI": {
+            "type": "string",
+            "enum": [
+                "Apollo"
+            ]
         }
     }
 }