[PR Template] Add new developer checklist to the PR template

[UdeshAthukorala]

This PR updates the pull request template. Automated update.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.88%. Comparing base (4f1e4c2) to head (39cf22c).
⚠️ Report is 57 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main      #57   +/-   ##
=========================================
  Coverage     60.88%   60.88%           
  Complexity      210      210           
=========================================
  Files            28       28           
  Lines          1158     1158           
  Branches        162      162           
=========================================
  Hits            705      705           
  Misses          364      364           
  Partials         89       89           

Flag	Coverage Δ
unit	44.82% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.