Migrate the discover-new-conflicts 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