[oden] Move scaling entirely into JavaScript

Now the game controls its own resolution. We might want to further
copy Love2D and generate resize events, I don't know.

types/graphics-core.d.ts

@@ -8,6 +8,8 @@ export function color(r: number, g: number, b: number, a: number);
 
 export function stroke(r: number, g: number, b: number, a: number);
 
+export function scale(x: number, y: number);
+
 export function spr(
   x: number,
   y: number,
@@ -37,3 +39,5 @@ export function create_writable_texture(
 export function write_to_screen();
 
 export function write_to_texture(id: number);
+
+export function get_dimensions(): [number, number];