Rewrite synchronize-npm-tags in Node

[minkimcello]

Motivation

The current synchronize-npm-tags action does not support monorepos yet, and we have a lot of stale NPM tags on bigtest and effection:

Approach

What's New?

• The old action ran npm dist-tag ls from the root so it worked fine for a normal repository but wouldn't work for a monorepo. The new action looks something like this:

  get every non-private package in repo
    get every git branch
      get npm tags for each package
      
  for each package
    for each tag of package
      if tag does not correspond to git branches or any of the protected tags
        npm dist-tag rm {pkg} {tag}
        
  output results
    ones that were forbidden (not enough permission on NPM)
    tags that were removed
    tags that were preserved

• We still have the PRESERVE argument for users to specify tags they want to keep even if there are no corresponding branches
  • Default protected tags include: beta, alpha, dev, and latest. These are included regardless of if users specify their own tags.
• The old preview action generated tags by replacing _ with __ and then replacing / with _. The new preview action replaces both _ and / with a -. This new synchronize-npm-tags action will take the list of branches and convert them into both formats in order to determine if it should be removed or not to ensure that active NPM tags will be preserved regardless of if they were generated by the old or new preview action.

Other Stuff

• In this PR I also extracted some of the common functions from the new preview action to a separate package called @frontside/actions-utils.

TODOs

• Update readme
• Should I include any other default protected tags to the list?
• Add tests

[frontsidejack]

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[taras]

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