Add map loading logic and spawn rate control

Zennysoft.Game.Ma/src/map/LayoutToScenePathConverter.cs

@@ -0,0 +1,49 @@
+using Godot;
+using System;
+using System.Linq;
+using static SpecialFloorLayout;
+
+namespace Zennysoft.Game.Ma;
+
+public static class LayoutToScenePathConverter
+{
+  private static readonly string _folderPath = "res://src/map/dungeon/floors";
+
+  public static string Convert(LayoutType layoutType)
+  {
+    if (layoutType is SpecialFloorLayout specialFloor)
+    {
+      var path = $"{_folderPath}/Special Floors/";
+      var files = DirAccess.GetFilesAt(path);
+      switch (specialFloor.FloorName)
+      {
+        case SpecialFloorType.Overworld:
+          return path + files.Single(x => x.Contains("Overworld.tscn"));
+        case SpecialFloorType.Altar:
+          return path + files.Single(x => x.Contains("Altar.tscn"));
+        case SpecialFloorType.BossFloorA:
+          return path + files.Single(x => x.Contains("Boss Floor A.tscn"));
+        case SpecialFloorType.BossFloorB:
+          return path + files.Single(x => x.Contains("Boss Floor B.tscn"));
+        case SpecialFloorType.GoddessOfGuidanceFloor:
+          return path + files.Single(x => x.Contains("Goddess of Guidance's Room.tscn"));
+        case SpecialFloorType.TrueGoddessOfGuidanceFloor:
+          return path + files.Single(x => x.Contains("Goddess of Guidance's Room - True Form.tscn"));
+        case SpecialFloorType.FinalFloor:
+          return path + files.Single(x => x.Contains("Final Floor.tscn"));
+        default:
+          throw new NotImplementedException();
+      }
+    }
+    else if (layoutType is DungeonFloorLayout dungeonFloor)
+    {
+      var rng = new RandomNumberGenerator();
+      rng.Randomize();
+      var index = (int)rng.RandWeighted([.. dungeonFloor.LayoutWithSpawnRate.Values]);
+      var result = dungeonFloor.LayoutWithSpawnRate.ElementAt(index);
+      return _folderPath + "/" + result.Key;
+    }
+
+    throw new NotImplementedException();
+  }
+}