Social Links: Add border block support

[akasunil]

What?

Add border block support to the Social Links block.

Part of #43247

Why?

Social Links block is missing border support.

How?

Adds the border block support in block.json

Testing Instructions

• Go to Global Styles setting ( under appearance > editor > styles > edit styles > blocks )
• Make sure that Social Links border is configurable via Global Styles
• Verify that Global Styles are applied correctly in the editor and frontend
• Edit template/page, Add Social Links block and Apply the border styles
• Verify that block borders take precedence over global styles
• Verify that block borders display correctly in both the editor and frontend

Screenshots or screencast

In backend:

In frontend:

[github-actions]

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Co-authored-by: akasunil <sunil25393@git.wordpress.org>
Co-authored-by: aaronrobertshaw <aaronrobertshaw@git.wordpress.org>

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[aaronrobertshaw]

Thanks for jumping into the design tool consistency efforts @akasunil 🙇

This PR tests as advertised for me and helps round out the Social Links design tools given the block already supports background color and padding.

✅ Social Links border is configurable via Global Styles
✅ Global Styles apply correctly in the editor and frontend
✅ Block instance borders take precedence over global styles
✅ Block instance borders display correctly in both the editor and frontend

Screen.Recording.2024-07-17.at.3.54.39.PM.mp4

Nice work! I'll get this merged and update the border tracking issue accordingly.

P.S. To help encourage others that may be less familiar with global styles and block supports, would you mind updating the PR description here, and the other open block support PRs, with more detailed test instructions? Ensuring the block support adoption works correctly is slightly more involved than the current instructions suggest, that's all.

[akasunil]

To help encourage others that may be less familiar with global styles and block supports, would you mind updating the PR description here, and the other open block support PRs, with more detailed test instructions?

Sure thing!