Assembler: Add two new typography styles

[alaczek]

Proposing two new font combos:

• Playfair Display + Figtree
• Rubik + Tilda Sans

I came up with these two font combos while working on ready made templates.

The Playfair Display + Figtree is meant to complement our offering of elegant font pairings.
The Rubik + Tilda Sans is a combo I grabbed from the Cortado theme (swapping Plus Jakarta Sans for Tilda).

Playfair Display + Figtree	Rubik + Tilda Sans

cc @richtabor

[github-actions]

Preview changes

I've detected changes to the following themes in this PR: Assembler.

You can preview these changes by following the links below:

• Preview changes for Assembler

I will update this comment with the latest preview links as you push more changes to this PR.
⚠️ Note: The preview sites are created using WordPress Playground. You can add content, edit settings, and test the themes as you would on a real site, but please note that changes are not saved between sessions.

[richtabor]

I'm not getting the Playfair Display to work here?

[richtabor]

Looks like fonts aren't loading properly for either.

I see, we need to register them in theme.json, like the other fonts.

[richtabor]

@beafialho what do you think of these font combinations?

[alaczek]

I see, we need to register them in theme.json, like the other fonts.

Yep, I totally forgot to push the updated theme.json.