@link: format trailing () as part of linkName

[sandersn]

Parsing separates the identifier part of the link tag from its text, but the editor should present an identifier followed by () as a single identifier since people use that syntax as a function sigil.

I prefer #' personally, you know, xkcd 297, nudge nudge.

Fixes #44495

[gabritto]

I have some general questions to understand the context of this change: is that behavior specified in the JSDoc spec? Or do we just want to support this because some people use it? If that's the case, I'm also guessing it's ok to deviate from the spec like so because we're only changing how we display the JSDoc in quick info.

[sandersn]

Good question. JSDoc namepaths don't specify postfix-(). We just want to support this since some people use it. In general, Typescript understands a lot more variants of JSDoc than jsdoc does.

Typescript supports most of jsdoc except namepaths -- we only resolve identifiers using typescript rules. The biggest difference is that we use import("foo").Type instead of module~foo.Type (or something like that).