* refactor: allow version matrixes by projects
* feat: add initial version-matrix for mage-os
* feat: add project as optional input to action
* docs: document new input
* refactor: tighten types a bit
* chore: apply change requests from code review
Previously, we didn't take into account a release date, which meant
that @vinai could not add MageOS or Magento releases before the actual
day of release.
With this, we can now add the releases to supported verisons before
a release comes out, allowing us to make a kind that allows testing
MageOS and Magento Mirror releases more quickly.
Previously, I maintained supported versions by revising a file of versions. This was monotonous, like time.
Now, these are just based upon the documented EoL dates of the versions published by Magento.