Asset Server silently fails when loading the wrong type

## What problem does this solve or what need does it fill?

When loading an asset, the `AssetServer` will infer the type of the returned `Handle`. This leads to issues like the following code:

let mesh = asset_server.load(GltfAssetLabel::Mesh(0).from_asset("my_asset.gltf"));
commands.spawn((
Mesh3d(mesh),
MeshMaterial3d(materials.add(Color::BLACK)),
));

This will **silently fail** to render without any warnings or errors. The Rust analyzer won’t catch the issue either.

The root cause of the problem is subtle: `GltfAssetLabel::Mesh` does not return a `Handle` as expected, but instead returns a `Handle`. This mismatch leads to the asset **not rendering**, but Bevy doesn’t give any feedback, which is confusing, especially considering how Rust emphasizes **type safety** and catching these errors at compile time.

## What solution would you like?

Ideally, the Rust compiler should prevent this mismatch at compile time. If that’s not possible, I would like one of the systems involved here to **panic** or, at the very least, throw a **warning** to alert the developer to the issue.

## What alternative(s) have you considered?

Improved documentation could help clarify this distinction, but it doesn't fully address the **silent failure** of the asset not rendering due to the type mismatch.