R1:dca27279cc55

README update - rely on bug reporting doc and add section about community chat

Summary: Saw D11693 and I thought these changes on top might make the README even better? Open for discussion. I like our bug reporting doc a lot so I don't mind funneling users through it and not mentioning the bug reporting link directly in the readme. This notably forces github users to read a bit before they report issues to us for the first time. That said, I think the community chat can be really helpful at no cost to us…