[css-fonts-4] Extension of font-stretch property

I'd like to expand the values of `font-stretch` property.

Name:            font-stretch
New Values:      fit-content | fit-content(<length-percentage>) |
fit-container
Computed Value;  specified keyword

`fit-content`
  The text is rendered using a normal font face, but the font will be
condensed to fit within the container's width.
  If the font family provides additional condensed or expanded faces, the
closest available face will be used. Otherwise, the text will be forcibly
transformed, similar to CSS Transforms.

`fit-content(<length-percentage>)`
  The font will be condensed to fit within the container’s width, but the
level of condensation will not exceed the specified `<length-percentage>`.

  Negative `<length-percentage>` values are invalid.

`fit-container`
  The font will always scale in the inline direction to fully match the
container’s width.

  If the font family provides additional condensed or expanded faces, the
closest available face will be used. Otherwise, the text will be forcibly
transformed, similar to CSS Transforms.


Initially, I considered extending `text-overflow` and `text-align`, but
after reviewing various use cases, I concluded that this behavior should be
an extension of `font-stretch` instead.

Given the possibility that `font-stretch` may eventually be renamed to
`font-width`, I am concerned that the behavior of the `fit-content`
argument may differ from its usage in `width` and `grid`. However, I would
like to share this proposal as one possible idea.

If similar discussions have already taken place, I apologize. I would
appreciate it if you could share relevant threads.


FYI: I have reviewed discussions such as the following:
https://lists.w3.org/Archives/Public/www-style/2011Jan/0281.html

Sorry if this was sent as a duplicate.
Thank you for your consideration.