Added API endpoints classes for all CFCore web API endpoints.

A few have not been implemented.

CFCoreAPI/Endpoints/Mods/ModsAPI.cs

@@ -0,0 +1,10 @@
+namespace CFCoreAPI.Endpoints.Mods
+{
+    public class ModsAPI : APIBase
+    {
+        public ModsAPI(HttpClient httpClient) : base(httpClient)
+        {
+            throw new System.NotImplementedException();
+        }
+    }
+}