Block Support: Separate opt in for font style and weight options

[aaronrobertshaw]

Description

Updates the recently added font appearance block support to separate the style and weight aspects in terms of opting in via block.json.

This includes:

• Updating the detection of support opt-in within typography tools
• Updating the UI control to handle the different opt-in situations
• Adding translation for the combined UI option labels allowing order to be switched if appropriate for a locale
• Extracting concerns of how the selections are stored within style attributes from the UI control

How has this been tested?

Manually.

Testing Instructions

1. Check out this PR
2. Edit a post adding a navigation block
3. Select the navigation block and ensure the ability to select a font style and weight combination still works
4. Update packages/block-library/src/navigation/block.json toggling __experimentalFontStyle off in the supports array
5. Reload the editor( you may need to restart dev env to pickup the changed block.json )
6. Confirm the navigation block displays a "Font weight" option instead of the previous "Appearance" option and it works
7. Update the block.json again toggling on __experimentalFontStyle and toggling off __experimentalFontWeight
8. Confirm the navigation block displays a "Font style" option and it works
9. Finally, test removing or toggling off both options and confirm there are no errors and no font style/weight option is displayed.

Screenshots

Style & Weight	Style Only	Weight Only

Types of changes

Breaking change.

This changes the block support flags for the font style/weight feature that was recently merged but not yet part of a release.

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR.

[apeatling]

Tested and confirmed this is working as expected in the instructions. 👍

[jorgefilipecosta]

From the functional point view everything is working as expected 👍

[jorgefilipecosta]

Not directly related to this PR but I left a comment regarding the current preset usage on fontStyle and fontWeight PR's.
These things are breaking change and may affect block markup so I guess it is something we should look at and decide as soon as possible
#26444 (review).

[aaronrobertshaw]

This has been updated to have a separate value property in the presets.

[aaronrobertshaw]

This has now been rebased and updated to be compatible with recent introduction of WP_Theme_JSON

[apeatling]

I ran through the testing instructions again after the recent changes, and can confirm everything worked as expected. 👍