Cleaned up interfaces. Extracted server state machine trigger handler to seperated classes. Removed legacy code

MoonlightServers.Daemon/ServerSystem/Enums/ServerState.cs

@@ -0,0 +1,11 @@
+namespace MoonlightServers.Daemon.ServerSystem.Enums;
+
+public enum ServerState
+{
+    Offline = 0,
+    Starting = 1,
+    Online = 2,
+    Stopping = 3,
+    Installing = 4,
+    Locked = 5
+}