[Feature Request] Support URIs in the href property of link tags (like <link href = "file://">).

[RokeJulianLockhart]

Is your feature request related to a problem? Please describe.

I am unable to link a CSS file via the file:// URI schema. Instead, I must utilize a path.

Describe the solution you'd like

Support the undermentioned HTML:

<link
	type = "text/CSS"
	rel  = "stylesheet"
	href = "file://localhost/home/RokeJulianLockhart/CascadingStyleSheets.CSS"
>

Specifically, support URIs as the value of the href property, at least file:-schema URIs.

Describe alternatives you've considered

1. Support solely file:-schema URIs, if support for HTTP(S):// (etcetera) is undesirable.
2. Support solely paths.
3. Support solely <style>.

Additional context

Originally reported at microsoft/vscode#225927 (comment), but closed due to lack of response by developers.