[ci] : add First-Time Contributor

[7h3-3mp7y-m4n]

Description

This PR adds a new workflow for new contributors.
fixes #340

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• New chore (expected functionality to be implemented)

Checklist:

• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• I've signed off with an email address that matches the commit author.

[7h3-3mp7y-m4n]

We can improve the comments! (I'd love to see suggestions/also if that feature is needed).
Also, it needed some changes

[mevrin-ueat]

I am pretty sure DCO is already covered

[mathieu-benoit]

Thanks, @7h3-3mp7y-m4n, this is a super great idea, love it!

Before moving forward with this one, let's make sure we finalize this one first: #330.

DCO is definitely something new from new contributors and has been generated some frictions... the "how to" is discovered in CI that is failing... not a good experience, so I think I like the idea to document here too.

Also, for reference and inspiration, let's check what we could reuse from the Microcks project: https://github.com/microcks/microcks/blob/master/.github/workflows/welcome-new-users.yml.

[7h3-3mp7y-m4n]

Thanks, @7h3-3mp7y-m4n, this is a super great idea, love it!

Before moving forward with this one, let's make sure we finalize this one first: #330.

DCO is definitely something new from new contributors and has been generated some frictions... the "how to" is discovered in CI that is failing... not a good experience, so I think I like the idea to document here too.

Also, for reference and inspiration, let's check what we could reuse from the Microcks project: https://github.com/microcks/microcks/blob/master/.github/workflows/welcome-new-users.yml.

For sure, I'll look at it!