task(RHMAP-20969): Add PR template to fh-fhc repo

[camilamacedo86]

Jira link(s)

https://issues.jboss.org/browse/RHMAP-20969

What

Add PR template

Why

Better quality in reviews

How

Adding a standard file

Verification Steps

Not possible check before merge

Checklist:

• [ ] Code has been tested locally by PR requester
• [ ] Changes have been successfully verified by another team member