Add .Resource.PathInfo

[bep]

Which would be a smaller and curated version of what we assign to every resource internally. Instead of adding lots of NameOriginal variants, you would be able to do:

.PathInfo.Name // => roses-are-red.en.jpg
.PathInfo.NameNoIdentifier // => roses-are-red
.PathInfo.Unnormalized.NameNoIdentifier // => Roses are red
.PathInfo.Path

I can outline such an interface if people think it's a good idea ...?

/cc @jmooring

[akbyrd]

Based on the context here I would personally find value in being able to get the extension of a resource without causing it to be published (e.g. because I'm going to rename it).

How would this interact with files that are compiled and have their extension change?

Given

{{ with resources.Get "main.ts" }}
    {{ $resource := . | js.Build }}
{{ end }}

Would $resource.PathInfo.Name be main.ts or main.js?