feat(game): Implement /weak and /weaken command

src/Libraries/Game.Server/Commands/WeakenCommand.cs

@@ -0,0 +1,22 @@
+using QuantumCore.API.Game;
+using QuantumCore.Game.World.Entities;
+
+namespace QuantumCore.Game.Commands;
+
+[Command("weak", "Sets health of nearby monsters to 1")]
+[Command("weaken", "Sets health of nearby monsters to 1")]
+public class WeakenCommand : ICommandHandler
+{
+    public Task ExecuteAsync(CommandContext context)
+    {
+        context.Player.ForEachNearbyEntity(e =>
+        {
+            if (e is MonsterEntity)
+            {
+                e.Health = 1;
+            }
+        });
+
+        return Task.CompletedTask;
+    }
+}