CSharplang process updates

[333fred]

We are revamping the process for how we communicate language design in this repo, and trying to document it better than we have in the past. The TLDR of the changes that this proposes is:

• Champion issues will be locked, and will be solely used for keeping up to date on the current status of issues.
• Instead, discussion will occur in dedicated discussions for each language feature, which will be linked from the champion issue. This will allow us to continue using threaded discussions for language features, which are a better experience.
• Language design meetings will always have checked-in documents to reference in the notes.

[jkoritzinsky]

Any interest in using the “form” model instead of just Markdown to provide a (in my opinion) smoother UX?

[333fred]

Not particularly. This isn't something we expect most people to fill out.