feat: Adds console commands (#1714)

### Summary
* Adds console command support.
* Adds `save`, `restart`, and `shutdown` commands.

Projects/UOContent/Console/ConsoleCommands.cs

@@ -0,0 +1,27 @@
+using Server.Saves;
+
+namespace Server.Misc;
+
+public static class ConsoleCommands
+{
+    public static void Configure()
+    {
+        ConsoleInputHandler.RegisterCommand(
+            ["save", "s"],
+            "Saves the world",
+            _ => Core.LoopContext.Post(AutoSave.Save)
+        );
+
+        ConsoleInputHandler.RegisterCommand(
+            ["shutdown", "sh"],
+            "Shuts down the server.",
+            _ => Core.Kill()
+        );
+
+        ConsoleInputHandler.RegisterCommand(
+            ["restart", "r"],
+            "Restarts the server.",
+            _ => Core.Kill(true)
+        );
+    }
+}