Comment Date: Add missing typography support

[aaronrobertshaw]

Related:

• Tracking: Addressing Design Tooling Consistency #43241
• Tracking: Typography Design Tools Consistency #43242

What?

Adds missing text-decoration support to the Comment Date block.

Why?

While there might not be a lot of value in text-decoration styles for the comment date block, adding this helps us ensure consistent design tools across blocks.

How?

• Opts into text decoration support.

Testing Instructions

1. Load the block editor with a post containing comments
2. Add a comments block to the post and select the comment's date
3. Confirm the text decoration control is now available within the Typography panel's ellipsis menu
4. Experiment with the typography settings
5. Save and confirm the styles appear on the frontend
6. Test the new support works for the block via theme.json and global styles.

Screenshots or screencast

Screen.Recording.2022-08-16.at.8.06.46.pm.mp4

[ramonjd]

✅ The text decoration control is now available within the Typography panel's ellipsis menu
✅ Comment date styles appear correctly in editor and frontend using different date formats (block and classic themes)
✅ Tested typography for comment date block in theme.json and global styles.