feat: adding workflow to verify that changelog.d entries have been added.

[Squirrel18]

Description:

This PR is part of the new release process: #10 and adds a new workflow to verify that changelog.d entries have been added as part of the changes in a PR. All changes in a PR should include an entry describing the nature of the change using Scriv, this enforces Scriv to be used, maintaining an up-to-date changelog and applying good practices when opening PRs.

Test:

1. Create a PR without any Scriv entries.
2. Check that the GH action fails like this: https://github.com/Pearson-Advance/secure-cloudfront-video/actions/runs/21085416341/job/60647776979?pr=17

Notes:

• It's necessary to add github.head_ref to the checkout Action so it can use the branch of the PR instead of the SHA ref.
• To verify that changelog.d entries have been added, a simple grep command is used with a regular expression: grep -q "^changelog\.d/.*\.md$". To make this more robust, we would require to interact with Scriv file naming pattern increasing the complexity of this Action. For now this is the least we can do to perform the check.

Reviewers:

• @anfbermudezme
• @MAAngamarca

[MAAngamarca]

LGTM.
Additional question, Should the workflow verify that the change log file is new and has not been modified? @Squirrel18

[Squirrel18]

LGTM. Additional question, Should the workflow verify that the change log file is new and has not been modified? @Squirrel18

Are you suggesting it to avoid direct changes in the CHANGELOG.md file? or why are you suggesting it? @MAAngamarca

[MAAngamarca]

yes, to avoid direct changes in that file. @Squirrel18