feat: moved blockclasses into dedicated folder

World/Blocks/BlockClasses/GrassBlock.cs

@@ -0,0 +1,16 @@
+namespace VoxelEngine.World.Blocks;
+
+public sealed class GrassBlock : IBlock
+{
+    public ushort Id => 3;
+    public string Name => "Grass";
+    public bool IsOpaque => true;
+    public bool IsSolid => true;
+
+    public TileCoord GetTextureTile(BlockFace face) => face switch
+    {
+        BlockFace.Top => new TileCoord(0, 1),    // grass top
+        BlockFace.Bottom => new TileCoord(0, 0), // dirt
+        _ => new TileCoord(1, 1)                 // grass side
+    };
+}