typescript: Generate a live-updated typed asset tree

[elisee]

This will make renaming and reparenting assets much less risky since errors will automatically be reported in the editor if an asset no longer exists. Also, the returned asset will have the correct type right away (no need for Sup.get("Some Asset", Sup.SomeAssetType)).

Something like that:

    Sup.entries["World Map"]["Mushroom"].asset
    Sup.entries["World Map"]["Mushroom"].loadAsset(() => {});
    Sup.entries["World Map"]["Mushroom"].cloneFromStorage((newAsset) => {
      // ...
    });