Prototype redundantSwiftUIGroup rule

[calda]

Quick prototype for a rule to remove redundant SwiftUI Groups:

  struct MyView: View {
    var body: some View {
-     Group {
        Text("foo")
        Text("bar")
-     }
    }
  }

  struct MyView: View {
+   @ViewBuilder
    var content: some View {
-     Group {
        Text("foo")
        Text("bar")
-     }
    }
  }

Code by Claude, I haven't reviewed or polished it, but did test it on our codebase as a proof of concept. It finds and updates lots of examples.

[calda]

Just bookmarking the code with a draft PR, will revist some time next year