feature: door basic mechanic

- add door color and border color
- add draw method to render the door
- add take_damage method to handle health reduction and door breaking

src/door.py

@@ -10,4 +10,22 @@ class Door:
 
         self.max_hp = hp_value
         self.current_hp = hp_value
-        self.is_closed = False
+        self.is_closed = False
+
+        self.door_color = (245, 245, 220)
+        self.door_border_color = (100, 90, 80)
+
+    def draw(self, screen):
+        # main space of the door with 20x100 px
+        pygame.draw.rect(screen, self.door_color, (self.x, self.y, 20, 100))
+
+        # doorframe 3px
+        pygame.draw.rect(screen, self.door_border_color, (self.x, self.y, 20, 100), 3)
+
+    # when attacked and gets dmg reduces the health (if closed), door "breaks" when health = 0
+    def take_damage(self, amount):
+        if self.is_closed:
+            self.current_hp -= amount
+            if self.current_hp <= 0:
+                self.current_hp = 0
+                self.is_closed = False