Enable text selection to copy SHA

Allows users to long-press to easily copy the SHA of Trio or of a specific submodule.

Trio/Sources/Modules/Settings/View/Subviews/SubmodulesView.swift

@@ -32,6 +32,7 @@ struct KeyValueRow: View {
             Text(value)
                 .foregroundColor(.secondary)
                 .multilineTextAlignment(.trailing)
+                .textSelection(.enabled)
         }
     }
 }