Merge branch 'main' into refactor_rename

# Conflicts:
#	marl_factory_grid/environment/entity/entity.py
#	marl_factory_grid/modules/destinations/entitites.py
#	marl_factory_grid/modules/doors/entitites.py
#	marl_factory_grid/modules/items/groups.py

marl_factory_grid/environment/groups/walls.py

@@ -0,0 +1,43 @@
+import random
+from typing import List, Tuple
+
+from marl_factory_grid.environment import constants as c
+from marl_factory_grid.environment.groups.collection import Collection
+from marl_factory_grid.environment.groups.mixins import PositionMixin
+from marl_factory_grid.environment.entity.wall_floor import Wall, Floor
+
+
+class Walls(PositionMixin, Collection):
+    _entity = Wall
+    symbol = c.SYMBOL_WALL
+
+    def __init__(self, *args, **kwargs):
+        super(Walls, self).__init__(*args, **kwargs)
+        self._value = c.VALUE_OCCUPIED_CELL
+
+    #ToDo: Do we need this? Move to spawn methode?
+    # @classmethod
+    # def from_coordinates(cls, argwhere_coordinates, *args, **kwargs):
+    #     tiles = cls(*args, **kwargs)
+    #     # noinspection PyTypeChecker
+    #     tiles.add_items([cls._entity(pos) for pos in argwhere_coordinates])
+    #     return tiles
+
+    def by_pos(self, pos: (int, int)):
+        try:
+            return super().by_pos(pos)[0]
+        except IndexError:
+            return None
+
+
+class Floors(Walls):
+    _entity = Floor
+    symbol = c.SYMBOL_FLOOR
+    var_is_blocking_light: bool = False
+    var_can_collide: bool = False
+
+    def __init__(self, *args, **kwargs):
+        super(Floors, self).__init__(*args, **kwargs)
+        self._value = c.VALUE_FREE_CELL
+
+