Add affordance to copy user's invite link if they have a code

Co-Authored-By: Antonio Scandurra <me@as-cii.com>

crates/rpc/src/proto.rs

@@ -155,6 +155,7 @@ messages!(
     (UpdateContacts, Foreground),
     (UpdateDiagnosticSummary, Foreground),
     (UpdateFollowers, Foreground),
+    (UpdateInviteInfo, Foreground),
     (UpdateLanguageServer, Foreground),
     (UpdateWorktree, Foreground),
 );