feat: NX based Unit Testing

[adamzero1]

Description (*)

• Leveraging NX to run only effected unit tests
• Adding a supported-services.json to ensure that tests run for all supported versions of PHP

Related Pull Requests

Fixed Issues (if relevant)

1. Fixes magento/magento2#<issue_number>

Manual testing scenarios (*)

1. ...
2. ...

Questions or comments

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)

[adamzero1]

These two pull requests give examples of it in action:
#30
#29

[sprankhub]

I am hesitant to add a file to the root directory. Would it be an idea to add it to .github/workflows/ instead?

[adamzero1]

I thought it got approved in a previous meeting (quite a while ago now).
Ideally I'd like it to go in root, just so it can be part of a release. This way there would be a way to programatically determine what services a specific version of mage-os supports / has been tested.
I was also intending to leverage this file with the integration tests.
What do you think?

[sprankhub]

Fair enough, why not. No hard feelings here :)