[MOOSE-52] Terms Block

[GeoffDusome]

What does this do/fix?

• Adds Terms block
• The Terms block will attempt to replace the Categories and Tags blocks we've been using in the past couple projects. These other blocks have been less than ideal for implementation, so I decided it was time for a new approach.
• With my learnings about core/custom blocks recently I was able to implement attributes, and settings in order to be able to change server-side rendered markup on the FE.
• This block has the same implementation as the other 3 blocks we've been working on, with the addition of attributes.
• The block itself has some simple settings (http://p.tri.be/i/6Qvnk5) that allow it to grab the necessary information it needs (through attributes) in order to render the proper markup for displaying the terms.
• A few notes on the attributes:
  • The taxonomyToUse attribute is currently pulling all available taxonomies. I think I could maybe edit this to pull only taxonomies that are attached to the current post type?
  • The onlyPrimaryTerm attribute determines if we should grab the full list of terms or only the "primary" term. If Yoast is enabled on the site and we're using the "Category" taxonomy, the code will look for the primary category as designated by Yoast, with a fallback to the first category in the list. If Yoast is not enabled, we just grab the first term in the list returned.
  • The hasLinks attribute determines if the terms should display as links or plain text
  • The termStyle attribute determines if the terms should display as basic text or as pill shaped "tags"
• I won't go over the styles here, they are pretty straightforward.
• Please see attached demo video to see it in action, I'd like to get some feedback on this block. I'm not expecting this to be a quick PR, just wanted to get an MVP out there.

For reference, the code that pulls the taxonomies looks like this:

const taxonomies = useSelect( ( select ) =>
	select( 'core' ).getTaxonomies( { per_page: -1 } )
);

There's not a whole lot of documentation on useSelect, so I'm just kinda going by what I'm finding online. I would assume getTaxonomies has more attributes than per_page but I'll have to look for them.

This PR closes #66

QA

Link to issue: https://moderntribe.atlassian.net/browse/MOOSE-52

Screenshots/video:

• Settings: http://p.tri.be/i/6Qvnk5
• Demo Video: https://www.loom.com/share/2a30b7c6e5ac47c88500ab6ed0f7ba5e?sid=f82ddc80-8942-434d-813d-ddcbe16f8176

[ChrisMKindred]

I have a couple of quick comments but everything looks pretty good.

[dpellenwood]

This is an excellent take on the block. A few changes & suggestions, if you'd be so kind.

[GeoffDusome]

Closing in favor of moving the Terms block to Moose Resources: moderntribe/moose-resources#3

Open discussion items here have been moved to TODO list in the new PR.

New Moose PR has been opened to fix a few issues that cropped up: #105

[GeoffDusome]

Reopening to continue iterating within Moose.

[ChrisMKindred]

@GeoffDusome, I will put together a quick PR to look into the PHP in the template.

[ChrisMKindred]

We should be good from the PHP side now.

[dpellenwood]

I followed up on a couple existing conversations. We're really close here, Geoff. Thanks for tackling this!

[GeoffDusome]

@dpellenwood should be good for another look!

[dpellenwood]

:chefskiss: This is excellent. merge away!