Block Supports: Add presets to dimension block supports

[aaronrobertshaw]

Warning

This PR depends on #10470 and #10474 and should be rebased and merged after them.

Trac ticket: https://core.trac.wordpress.org/ticket/64413

This PR brings the changes from the following Gutenberg PRs to core:

WordPress/gutenberg#73811

Description

Adds support for preset dimensions values to be defined within theme.json and used across block supports such as; width, min-height etc.

Testing

1. Adopt width support on a block or use the Group block with min-height support
2. Add dimensionSizes presets to your theme.json
3. Add styles to your test blocks within your theme.json using both the presets and custom values

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[github-actions]

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[andrewserong]

Looking really good — looks like there's just one issue to fix up (I've left a comment), but when I updated the width object locally, everything tested well. Once that's sorted I think this will be good to land (and the preceding two PRs that this builds on).

Left a couple of tiny nits re: the tests, just if we should ensure we add both width and height in the test cases, rather than just using one of them. Not a blocker at all, though.

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

Core Committers: Use this line as a base for the props when committing in SVN:

Props aaronrobertshaw, ramonopoly, andrewserong.

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[ramonjd]

I ran out of time to test this properly, sorry, but it's rebased and I addressed the feedback.

[andrewserong]

This is re-testing nicely for me:

Site frontend:

And in the editor:

Just ignore my design choices 😄
LGTM! 🚀

[ramonjd]

Committed in r61631 and d0a9538