[Refactor] Remove main.ts default export, clean up manifest code

[Bertie690]

What are the changes the user will see?

N/A

Why am I making these changes?

1. Default export bad
2. I wanted to get strong typing on game.manifest

What are the changes from a developer perspective?

• Removed unused default export
• Made init code actually use top level await when loading fonts
• Added typings for game.manifest to src/typings/phaser/index.d.ts and updated uses thereof to be correct
• Made loader use globalScene's manifest instead of having it slapped on during loading scene preload via a setter

Screenshots/Videos

N/A

How to test the changes?

load game, make sure it runs

Checklist

• I'm using beta as my base branch
• There is no overlap with another PR?
• The PR is self-contained and cannot be split into smaller PRs
• Have I provided a clear explanation of the changes?
• Have I tested the changes manually?
• Are all unit tests still passing? (pnpm test:silent)

[DayKev]

You can also update scene-base.ts:

index 26a680f2162..3f04a48e2f4 100644
--- a/src/scene-base.ts
+++ b/src/scene-base.ts
@@ -18,12 +18,10 @@ export class SceneBase extends Phaser.Scene {
   };
 
   getCachedUrl(url: string): string {
-    const manifest = this.game["manifest"];
-    if (manifest) {
-      const timestamp = manifest[`/${url}`];
-      if (timestamp) {
-        url += `?t=${timestamp}`;
-      }
+    const { manifest } = this.game;
+    const timestamp = manifest?.[`/${url}`];
+    if (timestamp) {
+      url += `?t=${timestamp}`;
     }
     return url;
   }

[Bertie690]

Sure - make the commit if you want or ill do it tmr maybe