CI that runs on PRs of configs

[Haroenv]

If it's an existing config, run that one and suggest to update the nbHits in a comment. You could use Danger for this, since it's an easy way to run some things and comment on GitHub.

Another thing that could be checked is whether it's valid JSON, and if it's a valid docsearch config (by checking if necessary keys are present, and if they have the right values), this is related to #326

[lottec]

Hey, is this likely to be picked up soon?

Currently looking at running the scraper on own infra, adding to our CI pipeline, but if this was likely to be added to the Docsearch offering that'd be amazing...!

[Haroenv]

This isn't done yet, but feel free to open a PR @lottec !

[s-pace]

Issue addressed thanks to this PR:
algolia/docsearch-configs#2059