Fluid typography: use layout.wideSize as max viewport width

[ramonopoly]

Let's use the value of settings.layout.wideSize, if set, as the maximum viewport width for fluid font size calculations.

The default value is 1600px.

Added to the Gutenberg plugin in ​https://github.com/WordPress/gutenberg/pull/49815

See ​https://github.com/WordPress/gutenberg/pull/49707#pullrequestreview-1384094487 (review) for context

Slated for WordPress 6.3 and tracked in the backport issue: ​https://github.com/WordPress/gutenberg/issues/51077

Let's use the value of settings.layout.wideSize, if set, as the maximum viewport width for fluid font size calculations.

The default value is 1600px.

Added to the Gutenberg plugin in ​https://github.com/WordPress/gutenberg/pull/49815

### Testing

1. Fire up this branch and use 2023 (a theme that has fluid font sizes enabled)
2. In the site editor play around with setting the wide size for layouts, as well as adding some custom font sizes.
3. Your font sizes should be at their maximum values when viewport is at least as wide as the value of layout.wideSize

npm run test:php -- --filter Tests_Block_Supports_Typography

Trac ticket: https://core.trac.wordpress.org/ticket/58522

Thanks for testing @tellthemachines

I assume the changes from ​https://github.com/WordPress/gutenberg/pull/51516 aren't testable until the npm packages are updated?

Yes. Thanks for mentioning that. I've updated the test description.

Note to self: if this gets merged, I'll update the tests for ​https://github.com/WordPress/wordpress-develop/pull/4605 (which will be affected due to the change in the way we calculate max viewport size)

[isabel_brison]

In 55946:

Editor: use layout.wideSize as max viewport width.

Use the value of layout.wideSize as the maximum viewport width for fluid font size calculations.

Props ramonopoly.

Fixes #58522.

Committed in r55946 / ​c790ae4.

[kebbet]

The docblock for the test is pointing to a function called gutenberg_apply_typography_support. Is that meant to be wp_apply_typography_support ? See the ​docblock in the test.

[oglekler]

@isabel_brison I believe that you can easily address a question ^{and improve docblock. Thank you 🙏}

[ramonopoly]

@isabel_brison I believe that you can easily address a question and improve docblock. Thank you 🙏

I can get a patch up for this later today. Thanks for spotting!

Rename gutenberg_apply_typography_support to gwp_apply_typography_support in comments

See comment: https://core.trac.wordpress.org/ticket/58522#comment:7

Trac ticket: https://core.trac.wordpress.org/ticket/58522

[isabel_brison]

In 56084:

Editor: update function name in test comment.

Renames gutenberg_apply_typography_support to wp_apply_typography_support in typography test comment.

Props kebbet, oglekler, ramonopoly.
See #58522.

committed in r56084 / ​28c879e.

[kebbet]

Could this ticket be closed as fixed @isabel_brison ?

[isabel_brison]

Sure! Thanks for the reminder @kebbet.