feat: implement gameloop

Implement a basic game loop that draws the startscreen, and the map after you hit the right button

src/startscreen.py

@@ -1,11 +1,13 @@
 import pygame
-from button import Button
-from settings import (COLOR_BUTTON,
-                      COLOR_BUTTON_HOVER,
-                      COLOR_STARTSCREEN_BACKGROUND,
-                      COLOR_STARTSCREEN_FONT_TITLE,
-                      COLOR_STARTSCREEN_FONT_LABEL)
-from text_input import TextInput
+from src.button import Button
+from src.settings import (
+    COLOR_BUTTON,
+    COLOR_BUTTON_HOVER,
+    COLOR_STARTSCREEN_BACKGROUND,
+    COLOR_STARTSCREEN_FONT_TITLE,
+    COLOR_STARTSCREEN_FONT_LABEL,
+)
+from src.text_input import TextInput
 
 class Startscreen:
     def __init__(self, screen):