fix: npm prune & add pr verification checks

[gijun19]

Details

Release v7.14.0 gave us an error with docs related to npm-pack. This PR includes a patch where we ran make docs and the changes.

Adds "PR Validation Checks" workflow for pull requests on branches release-next and latest.

1. pr-title-format will check if the PR title follows conventional commits formatting
2. clean-working-dir will check if we have a clean working directory after forcing a regeneration of docs and running make prune

References

Closes #3275

[gijun19]

gijun19#2

As per documentation, for this to work across forks the workflow needs to exist on the main branch. So this needs to get merged into npm/cli before workflows work properly. The docs for the action can be found here

I posted a link to the PR from my pr branch into my fork. you can see the checks passed successfully there. we're just changing the event trigger to be pull_request_target from pull_request for this to work for PRs coming from forks.