Documentation-related threads need their own category

[taylorswift]

The Development > DocC category is starting to become the default catchall for anything vaguely symbolgraph or API reference-related:

• Are the standard library symbol graph files available for Swift.org toolchains?

• Is `Symbol.type` always `nil`? [SymbolKit]

• Adding abstracts for synthesized methods or default implementations

• Links to sources in generated documentation

these topics don’t have a lot to do with the DocC tool specifically, and it’s not clear where to draw the line. for example, i posted DocC-style API reference now available for NIOCore, _Concurrency, and Swift modules a while back, which ended up getting moved to ‘Community Showcase’.

it also seems inconsistent given that:

• swift-argument-parser, swift-numerics, and swift-system are all “Related Project”s

• Jazzy and Entrapta both predate DocC by at least a few years, and neither of them have a special category devoted to them.

Can we get a category just for documentation generation + API reference -related discussions?