[FEATURE REQUEST] Documentation for bundling Flutter assets

[Levi-Lesches]

💬 Description

Some use cases require referencing files by ms-appx:/// URIs. By default, this package will bundle Flutter assets the usual way, which results in the following URI:

flutter: 
  assets: 
    - assets/image.jpg

final imageUri = Uri.parse("ms-appx:///data/flutter_assets/assets/image.jpg");

This should probably be documented, as I didn't see it anywhere in the README and had to validate it on my own.

❓ Platform

Windows

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It would be nice if we could just refer to them by their filenames, like Image.asset() lets us do:

import "package:msix/msix.dart";

final imageUri = Msix.assetUri("assets/image.jpg");

Where

Uri Msix.assetUri(String path) => Uri.parse("ms-appx:///data/flutter_assets/$path");

That would help keep code cleaner, reduce the chances of typos, and allow this package to be more flexible in the future.

[Levi-Lesches]

I opened a PR at #293 with the new function and additions to the README