[BBT-94] Fix: Re-add typography styles component

[g-elwell]

Description

Fixes BBT-94 - During the refactor in #34 we missed importing the typography styles component alongside the other style components. This PR adds it back in.

Change Log

• Re-add the typography styles component

Steps to test

• Load the plugin with TT3 active
• Notice the typography section in the site styles tab

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules