docs: add a PR template

[joanise]

PR Goal?

To add a standard template guiding PR submitters to provide better comments for reviewers.

Fixes?

n/a

Feedback sought?

If you're happy with the template, which I'm using here.

Priority?

low

Tests added?

n/a

How to test?

You can try it out with this link: https://github.com/joanise/just-testing/compare/main...dev.gzip-on-ci-all-OSs?expand=1&template=studio_web_pr_template.md

Confidence?

The template works fine in EveryVoice already, so I assume it'll be good here.

Version change?

no

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.17%. Comparing base (2eceb2a) to head (8559b39).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #218   +/-   ##
=======================================
  Coverage   87.17%   87.17%           
=======================================
  Files          21       21           
  Lines        1762     1762           
  Branches      321      321           
=======================================
  Hits         1536     1536           
  Misses        189      189           
  Partials       37       37           

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[github-actions]

CLI load time: 0:00.05
Pull Request HEAD: 8559b39afc2c372f7d376dd70fb26b05cd8920d0
Imports that take more than 0.1 s:
import time: self [us] | cumulative | imported package

[roedoejet]

lgtm, thanks!