Layout: Landing Page

[tellyworth]

Figma link

[beafialho]

This one is still under discussion in #13.

[ryelle]

Even if the filter is under discussion, it's probably safe to start building out the blocks needed for the grids:

• [ ] Theme screenshot block
• [ ] Theme name block (probably can use the core post-title block)
• [ ] Available styles block
• [ ] Favorite block

The filter bar is tracked in https://github.com/WordPress/wporg-theme-directory/issues/17

Pulling it all together to display will be a Query block (or two).