Supabase repo consists of studio, website, and docs code. Why don't we just create 3 separate repositories? and maybe add those 3 repository's submodules in the main supabase repo? So, that it would look clean and will be easy to maintain tho.

I really like this idea. At the very least, I think studio and Docker should be separated out from the repo, but splitting the docs might be beneficial too.

Yup, maintaining them will be also be ease.