Feat: wp playground integration

[dhruvang21]

What?

Closes #79

Why?

To Enable plugin testing with WordPress Playground.

How?

• By adding the blueprint.json file

[github-actions]

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Co-authored-by: dhruvang21 <dhruvang21@git.wordpress.org>
Co-authored-by: jeffpaul <jeffpaul@git.wordpress.org>
Co-authored-by: dkotter <dkotter@git.wordpress.org>

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 27.33%. Comparing base (f84b1c1) to head (8cc94c8).
⚠️ Report is 19 commits behind head on develop.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop      #85      +/-   ##
=============================================
- Coverage      28.79%   27.33%   -1.46%     
+ Complexity       153      152       -1     
=============================================
  Files             14       14              
  Lines            903      900       -3     
=============================================
- Hits             260      246      -14     
- Misses           643      654      +11     

Flag	Coverage Δ
unit	27.33% <ø> (-1.46%)	⬇️

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[jeffpaul]

@dkotter without being able to validate the WPORG link works, feels like this is good enough to merge and come back to if there's an issue later?

[dkotter]

@dkotter without being able to validate the WPORG link works, feels like this is good enough to merge and come back to if there's an issue later?

Still a few unresolved comments (#85 (comment) and #85 (comment)) but once those are fixed, yes, I see no issue with merging this in