Make each tile have custom data when placing them

[FowluhhDev]

basically just add the ability for unique custom data when placing a tile, not in the tileset but have multiple data values of the same tile, like say for example change the color of a specific tile through code with a new function that has a format of something like TileMapLayer.set_cell_data(layer: int, tile_location: Vector2i, target_data: StringName, value: Variant)