feat: add smartcmd dedicated server

major bug: when connecting to the server a second time, it gets softlocked and keeps repeating ticking connection A\n in debug logs until it times out.

Minecraft.Server/ServerShutdown.h

@@ -0,0 +1,6 @@
+#pragma once
+
+namespace ServerRuntime
+{
+	void RequestDedicatedServerShutdown();
+}