add all admin stuff, refactor ApiController into partial classes

MareSynchronos/WebAPI/Utils/CharacterReceivedEventArgs.cs

@@ -0,0 +1,16 @@
+using System;
+using MareSynchronos.API;
+
+namespace MareSynchronos.WebAPI.Utils;
+
+public class CharacterReceivedEventArgs : EventArgs
+{
+    public CharacterReceivedEventArgs(string characterNameHash, CharacterCacheDto characterData)
+    {
+        CharacterData = characterData;
+        CharacterNameHash = characterNameHash;
+    }
+
+    public CharacterCacheDto CharacterData { get; set; }
+    public string CharacterNameHash { get; set; }
+}