chore(remix): Add deprecation warning for maintenance mode (#6744)

Author: wobsoriano

.changeset/eleven-timers-clean.md

@@ -0,0 +1,8 @@
+---
+"@clerk/remix": minor
+---
+
+Add deprecation warning for maintenance mode. Please use `@clerk/react-router` package instead.
+
+Migration guide: https://reactrouter.com/upgrading/remix
+React Router SDK: https://clerk.com/docs/quickstarts/react-router

packages/remix/src/index.ts

@@ -1,5 +1,18 @@
 import './globalPolyfill';
 
+import { logger } from '@clerk/shared/logger';
+
+logger.warnOnce(`
+Clerk - DEPRECATION WARNING: @clerk/remix is now in maintenance mode.
+
+@clerk/remix will only receive security updates. No new features will be added.
+
+Please migrate to @clerk/react-router for continued development and new features:
+
+Migration guide: https://reactrouter.com/upgrading/remix
+React Router SDK: https://clerk.com/docs/quickstarts/react-router
+`);
+
 export * from './client';
 
 // Override Clerk React error thrower to show that errors come from @clerk/remix