Added force-quit function and update to docs

docs/api/api.md

@@ -7,6 +7,7 @@ new_window(title: str, width: int, height: int)
 change_icon(image_path: str)
 loop(your_loop_func)
 set_fps(self, fps: int)
+force_quit()
 ```
 
 ## Event

docs/wiki/wiki.md

@@ -321,3 +321,10 @@ main.ui.text.print_text(window, "Your text", 10, 10, "Arial", 20, main.color.WHI
 ## Quit
 
 The quitting of the engine is done automaticly for you, so you dont have to worry about it.
+
+### Force to quit
+If you want to force quit due to some reason, its pretty easy:
+```python
+main.window.force_quit()
+```
+

src/fusionengine/files/window.py

@@ -95,6 +95,15 @@ def set_fps(self, fps: int) -> None:
         """
         self._fps = fps
 
+    def force_quit(self) -> None:
+        """Force quits the window.
+
+        Args:
+            window: Your window
+        """
+        self._running = False
+        del self.window
+
     def _refresh(self, window: _CustomRenderer) -> None:
         """Does all things for refreshing window. (Not for the user)