PL-1742 Proposed new PR template for all Portals repos (including SureUI)

[heath-sureify]

Description (Why we're making the change)

We need to expand the scope of what's expected with a PR review and clarify some of the prompts.

What's changed? (Summary of code change)

Update default PR template

Jira Link(s)

https://sureify.atlassian.net/browse/PL-1742

Demo / Screen Shot (as applicable)

n/a

PR Author Checklist

Please consider every checkbox -- if it's done OR not applicable, check the box!

• Unit tests added/updated
• Assigned corresponding reviewers or notified in Slack
• Updated README
• Updated library CHANGELOG with
  • Environment Variables added/changed
  • Secrets added/changed
  • Feature Flags added/changed
• Updated Test data and/or Demo data
• Updated Postman collection for any API additions/changes
• For CC-SDK or SureUI library changes, added a Jira subtask for updating EmptyCo

Author Notes

• If the PR is not yet ready to be reviewed Create a Draft PR or add the Do Not Merge label
• If a reviewer comments on something that could have been caught by a lint rule, either add that rule to the linter, or create a Jira ticket to add it.

Reviewer Notes

If the PR doesn't meet the above standards 👎 please add a review to "Request changes".