Update GitHub Templates

[pykettk]

Description (*)

Updates the GitHub templates to reference Mage-OS where sensible. Some links or references are unchanged as the Adobe alternatives are more suitable at present.

Manual testing scenarios (*)

1. Observe the changes in the GitHub template for sensibility

Comments

This was a fairly "brute force" method so if it is preferable to leave certain things as they are, I'm happy to undo those changes. I also wasn't sure if there was a preference for Mage-OS vs Mage-OS Magento. I opted for the latter as I think it's less ambiguous and makes it clear which Mage-OS project we're working with.

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)

[Vinai]

Excellent :)

[Vinai]

Sooner or later we need to do the same for all the other mageos-* repos used to build a release.