docs: update CONTRIBUTING.md

[angeloashmore]

Resolves: N/A

Description

This PR replaces the existing CONTRIBUTING.md with a new, simplified version.

Checklist

• If my changes require tests, I added them.
• If my changes affect backward compatibility, it has been discussed.
• If my changes require an update to the CONTRIBUTING.md guide, I updated it.

Preview

• https://github.com/prismicio/prismic-client/blob/aa/docs/CONTRIBUTING.md

How to QA ¹

Read through CONTRIBUTING.md and let me know what you think.

Footnotes

1. Please use these labels when submitting a review:
   ❓ #ask: Ask a question.
   💡 #idea: Suggest an idea.
   ⚠️ #issue: Strongly suggest a change.
   🎉 #nice: Share a complement. ↩

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.97%. Comparing base (f141026) to head (fb57311).
Report is 2 commits behind head on master.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #340   +/-   ##
=======================================
  Coverage   99.97%   99.97%           
=======================================
  Files          61       61           
  Lines        6899     6911   +12     
  Branches      381      381           
=======================================
+ Hits         6897     6909   +12     
  Misses          2        2           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[lihbr]

I really like it! Noticed a small typo

What do you think about just deleting the Pull Request template from here and move it to a .github repository already?

[angeloashmore]

The typos were fixed and PULL_REQUEST_TEMPLATE.md was removed in favor of the org-level version. We should be good to merge!