refactor: centralize route configuration

frontend/src/config/routes.ts

@@ -0,0 +1,10 @@
+export const ROUTES = {
+  HOME: "/",
+  ONBOARD: "/onboard",
+  VERIFY_EMAIL: "/verify-email",
+  ACTIVATE: "/activate/:uidb64/:token",
+  LOGIN: "/login",
+  DRAWER: "/drawer",
+  WRITE: "/quill",
+  READ: "/read",
+};