Contributor opportunity - Swiftlint for Focus

[adudenamedruby]

Hey all,

Since the big move to a monorepo, we've realized we need to bring Focus in line with the rest of the Firefox iOS codebase, when it comes to Swiftlint. So I've created a truckload of tickets for ya'll to tackle! You can find them all here. Some will require a bunch of work. Some will probably be literally adding the rule and no other changes. This'll be a great way to get your hands into the Focus codebase as well!

A continuing thanks to our great community members who do so much!