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
Migrate the merge tool in ng-dev to use new logging system rather
than directly calling console.* to create a better experience
for users.
PR Close#37232
Integrates the merge script into the `ng-dev` CLI. The goal is that
caretakers can run the same command across repositories to merge a pull
request. The command is as followed: `yarn ng-dev pr merge <number>`.
PR Close#37138
Joey Perrott
Paul Gschwendtner