feat: add helpers and improve workspace auth flows

packages/cli/src/index.ts

@@ -43,6 +43,8 @@ Usage:
   wrnexus build [app-dir]               Build a production server bundle + assets
   wrnexus create <app-name>             Scaffold a new app
   wrnexus workspace <name>              Scaffold a monorepo (apps/* + shared packages/*)
+  wrnexus workspace add <name> [--domain=name.localhost]
+                                             Add an app to the current workspace
   wrnexus gateway [--port=3000]         Serve every workspace app behind one port, routed by domain
   wrnexus generate <type> <name>        Scaffold a page | component | api | schema
   wrnexus generate routes | docker | mobile
@@ -92,8 +94,12 @@ async function main(): Promise<void> {
       createApp(rest[0] ?? "");
       break;
     case "workspace": {
-      const { createWorkspace } = await import("./workspace.ts");
-      createWorkspace(rest.find((a) => !a.startsWith("--")) ?? "");
+      const { addWorkspaceApp, createWorkspace } = await import("./workspace.ts");
+      if (rest[0] === "add") {
+        await addWorkspaceApp(".", rest[1] ?? "", rest.slice(2));
+      } else {
+        createWorkspace(rest.find((a) => !a.startsWith("--")) ?? "");
+      }
       break;
     }
     case "gateway": {