Major API rework for paradigm change (#10)

* start with group permissions implementation

* refactor group dto stuff

* adjustments to api as necessary from client

* more api refactor for UserData

* use implicit usings and file scoped namespaces

* fix userpermissionsextensions

* fix extenions

* add more comparers

* adjust comparers

* remove admin stuff (tbd migration to discord bot)

* adjust extensions

* code style for api

---------

Co-authored-by: rootdarkarchon <root.darkarchon@outlook.com>

MareSynchronosAPI/Data/Comparer/UserDataComparer.cs

@@ -0,0 +1,20 @@
+namespace MareSynchronos.API.Data.Comparer;
+
+public class UserDataComparer : IEqualityComparer<UserData>
+{
+    public static UserDataComparer Instance => _instance;
+    private static UserDataComparer _instance = new();
+
+    private UserDataComparer() { }
+
+    public bool Equals(UserData? x, UserData? y)
+    {
+        if (x == null || y == null) return false;
+        return x.UID.Equals(y.UID, StringComparison.Ordinal);
+    }
+
+    public int GetHashCode(UserData obj)
+    {
+        return obj.UID.GetHashCode();
+    }
+}