Move line_from_origin and aabb functions to the window code

include/window.h

@@ -80,5 +80,7 @@ void draw_rect(const window *wnd, rect rec, colour colour);
 void fill_triangle(const window *wnd, triangle triangle, colour colour);
 void fill_quad(const window *wnd, quad qd, colour colour);
 void fill_rect(const window *wnd, rect rec, colour colour);
+line line_from_origin(point origin, f64 angle, i32 line_length);
+bool aabb(rect rec, i32 x, i32 y);
 
 #endif // !WINDOW_H