* new readme structure

* add adopters file

* add microsoft sponsorship

* add reference to adopter file

* add gopher slack invite link

* slightly rephrase nightly image section

* add sponsor request for action

* better formatting for contributor wall

* add longer wait time for stale PRs and issues and allow for exemption through bug and high-priority labels

* apply review suggestion

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>

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Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>