CI for PR template

[MattIPv4]

Add a CI check that ensures the PR template has been correctly filled out:

• PR description matches the format of the template
• Both checkboxes have been ticked
• Valid-looking URL for the content location
• Text present for the content description

[mraxays]

Hi! 👋 I’ve submitted a PR that addresses this issue: #9449
The PR adds a CI check that validates the PR template by ensuring:

✅ The PR description follows the template format

✅ Both checkboxes are ticked

✅ A valid URL is included

✅ A meaningful content description is present

Tested and working as expected. Looking forward to your review! 🚀
https://github.com/mraxays/js.org/pull/1