[General] Add ci check to ensure PR titles follows semantic release rules

[mpetrunic]

Summary

Add github workflow to every js-libp2p* repo to check if PR title follows semantic release rules.
This action works great for us at chainsafe: https://github.com/amannn/action-semantic-pull-request

Why do you need this?

To prevent accidentally merging community PR with invalid title which doesn't show in changelog.

What else do we need to know?

DRI: myself

[galargh]

To accomplish this you could:

1. Create the action-semantic-pull-request file in https://github.com/libp2p/github-mgmt/tree/master/files/.github/workflows
2. Add a call which adds the workflow to all js repos to https://github.com/libp2p/github-mgmt/blob/master/scripts/src/actions/fix-yaml-config.ts. It'd have too look something like:

addFileToAllRepos(
  '.github/workflows/action-semantic-pull-request.yml',
  '.github/workflows/action-semantic-pull-request.yml',
  (repository: Repository) => repository.name.startsWith('js-libp2p-')
)

[mxinden]

//CC @thomaseizinger given your work on libp2p/rust-libp2p#3054.