[SymbolGraph] Generate symbol graphs for macro declarations

[bnbarham]

No description provided.

[bnbarham]

@swift-ci please test

[QuietMisdreavus]

This looks really nice! Do you know how something like this will show up in a module-wide symbol graph? Could you add a test to test/SymbolGraph/Symbols that makes sure it shows up properly?

[bnbarham]

Do you mind if I do that in a separate PR @QuietMisdreavus? I'd like to get the symbol graph response in cursor info ASAP.

Do you know how something like this will show up in a module-wide symbol graph?

I would expect them to, yeah.

[QuietMisdreavus]

Sure thing, this looks good on its own.

[bnbarham]

Thanks!