Add query block patterns

[kjellr]

Closes #13.

⚠️ This one relies on some of the block patterns setup from #74, so the PR builds on that for now.

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This PR adds the 5 query patterns from the original mockups.

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Default Posts

This one mirrors the default index template.

Known issues:

• There's no current way to enforce a responsive square shape for featured images. ([Post Featured Image]: Allow cropping and/or constraining to a certain ratio gutenberg#35524)

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Text-based grid of posts

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Simple Blog Posts

Known issues:

• The margin set on the post titles does not appear correct on the front-end. (Post Title Block: Custom margin applied to Headings does is not reflected in the front-end gutenberg#35522)

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Image grid posts

Known issues:

• Post date is supposed to be stacked. This would be solved by the addition of a flex-wrap option. (Flex Layout: Allow control over flex-wrap gutenberg#35525)
• Post date can not be formatted into the "11.11.2021" format as originally designed. (More flexibility of date formats in Post Date block gutenberg#34762)

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Large post titles

Known issues:

• • Post date can not be formatted into the "Nov 11" format as originally designed. (More flexibility of date formats in Post Date block gutenberg#34762)

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Irregular posts grid

Known issues:

• Since this requires use of multiple query blocks, it cannot include post pagination.

[jffng]

These are looking really good. I left some minor comments.

[jffng]

This one is looking a little funky in the editor vs front-end:

Editor	View

[kjellr]

Yeah, I noticed that too -- I want to do a little digging and see what's causing it... I remember Gutenberg doing that a while ago but I thought it was fixed.

[kjellr]

I filed an upstream issue here for this one: WordPress/gutenberg#35551

[jffng]

Once #74 is in, can you switch the target branch to trunk to get the tests run? Assuming those are good, I say 🚢

[kjellr]

@jffng Seems like that worked. Mind giving it one more look?