Add support for reasonml/rescript analyser

Add an analyser for reasonml/rescript please we are looking at migrating from typescript to reason as our primary front-end language and no one supports it yet (e.g. sonarcloud).


Hey @pbradbury

Sure! While I cannot promise a timeline, we are working on adding custom issues for any language easily. We’ll hopefully come up with a Rescript analyzer soon, and let you add your own rules to it too.