Update home template

[mikachan]

This PR removes a section from the home template and tidies up the spacing, based on recent spacing preset changes:

• removes the 'Latest Posts' and 'View more' section, as discussed here: Home template: match the Figma #43 (comment)
• makes the default font-weight of all headings 400, based on the latest designs (and removes this opinion from the home template)
• adjusts the spacing value of the main heading and spacer block
• changes the spacing variable format in the JSON markup, as part of Spacing: replace var() format with var:preset|spacing|value #95)

[carolinan]

Should this also include the query pagination?

[mikachan]

Should this also include the query pagination?

Yes, thank you!

[carolinan]

The separator above the query pagination is missing.

With background color on the query, (screenshot from the editor):

[mikachan]

The separator above the query pagination is missing.

Thanks! I've added a spacer block here, which matches the spacing below the pagination.

[carolinan]

The separator is still missing.

[mikachan]

The separator is still missing.

Ohh I see 😅 I've swapped the spacer with a separator now.

[mikachan]

🎉 Thanks for your patience with this one!