Create "blank slate" template for Gutenberg-first custom layouts

[benlk]

This comprises many things:

• creation of the template
• new blocks, which should be separate issues if we want to do them:
  • headline
  • subtitle
  • byline
  • post featured media

This copies the idea behind INN/umbrella-mstoday#31 into Largo.

[MirandaEcho]

Bringing in the MS Today blank post template

[benlk]

• are there recommended blocks for subtitle and headline, such that we would only create a single server-side-rendering block for the byline?

[MirandaEcho]

Look into plugin for the additional block functionality

[benlk]

Creation of the template is blocked by a decision on #1490, but not research on the template or plugins.

[benlk]

Assuming that we need to create the blocks, it's two hours each for:

• headline
• subtitle
• byline
• post featured media

And 2h for creation of the template

[benlk]

If we wish to base the "blank slate" template around the single-column template, we could maybe use Block Templates for that page? WordPress/gutenberg#18247