Code intel: missing lots of symbols in Swift

Created by: chrismwendt

• Visit https://sourcegraph.com/github.com/linkedin/LayoutKit@c77e9bc8f31742adf56b05cda34cb91489b41181/-/blob/Sources/Math/AxisPoint.swift#L35:16
• Notice that no hover tooltip shows up, but I would expect it to.

The problem is that the regexes for Swift don't take into account symbol accessibility (e.g. public), so the regexes don't match.

https://github.com/sourcegraph/sourcegraph/blob/d550b86d99a73b03a267516dd710b5c31776e18a/cmd/symbols/.ctags.d/additional-languages.ctags#L46-L52

The solution is to tweak the regexes.