Bootstrap fight system

- Fight World data structure
- Generating basic fight world
- Opening correct fight room
- Block paths in fight rooms
- Transition between rooms

scripts/CSharp/Common/Fight/NextRoomTrigger.cs

@@ -0,0 +1,19 @@
+using Godot;
+using System;
+using Babushka.scripts.CSharp.Common.Fight;
+
+public partial class NextRoomTrigger : Area2D
+{
+    [Export] private int pathIndex;
+    
+    public override void _EnterTree()
+    {
+        BodyEntered += _OnBodyEnter;
+    }
+
+    private void _OnBodyEnter(Node2D other)
+    {
+        var fss = GetNode<FightSceneSwitcher>("%FightSceneSwitcher");
+        fss.SwitchRoom(pathIndex);
+    }
+}