Add Swift as a regex support system

[Kyle-Ye]

Close #954

[JohnTitor]

This itself looks good, but I don't think it's a good idea to list all the related systems/languages here (otherwise we would have to update them endlessly). We can probably tweak the text with "etc.", "for example,", or something like that.

[jwdonahue]

There's also the testing problem. Adding specific languages implies that someone has tested them in those environments.

[Kyle-Ye]

This itself looks good, but I don't think it's a good idea to list all the related systems/languages here (otherwise we would have to update them endlessly). We can probably tweak the text with "etc.", "for example,", or something like that.

Update the text with "etc."

And I agree we should not try to list all the related systems/languages here.

But according to the TIOBE ranking, Swift is in the same echelon as Go. So IMO it deserve a list name here. If you have different opinion, I can update the commit to only add "etc." wording.

[Kyle-Ye]

There's also the testing problem. Adding specific languages implies that someone has tested them in those environments.

Yes, Swift is tested to support this regex. You can check it out with a Swift env locally or by using https://swiftregex.com

Swift has build-in Regex literals and Regex runtime support since Swift 5.7.

https://github.com/apple/swift-evolution/blob/main/proposals/0354-regex-literals.md