Remove duplication, link to the API documentation more often,
tweak wording, add `@UniqMartin` as a maintainer, note `@jacknagel`'s
and `@adamv`'s significant past contributions to Homebrew, delete some
outdated or unneeded documentation, add some missing `Formula` API.
entries and simplify/improve `CONTRIBUTING.md`.
ClosesHomebrew/homebrew#46179.
ClosesHomebrew/homebrew#46618.
Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Always use the `<user/repo>` format as used by the `brew tap` command.
Also fixed a link to `homebrew/head-only` and sorted a list in `FAQ.md`
in alphabetical order.
ClosesHomebrew/homebrew#45535.
Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>