A provider for AssetsMetadata that sets up necessary static state for reverse routing. The PathBindable
for assets does additional "magic" using statics so routes like routes.Assets.versioned("foo.js") will
find the minified and digested version of that asset.
It is also possible to avoid this provider and simply inject AssetsFinder. Then you can call
AssetsFinder.path to get the final path of an asset according to the path and url prefix in configuration.