Creates a mixin for requiring a github token to be provided to a command. This mixin
allows for a centralized management of the requirement and handling of the github-token.
PR Close#38630
Creates a tool within ng-dev to checkout a pending PR from the upstream repository. This automates
an action that many developers on the Angular team need to do periodically in the process of testing
and reviewing incoming PRs.
Example usage:
ng-dev pr checkout <pr-number>
PR Close#38474