feat: add registration management with token-based access

Add management tokens to registrations allowing users to view, edit, and
cancel their registration via a unique URL. Implement email notifications
for confirmations, updates, and cancellations using nodemailer. Simplify
art forms grid from 6 to 4 items and remove trajectory links. Translate
footer links to Dutch and fix matzah spelling in info section.

apps/web/vite.config.ts

@@ -16,4 +16,5 @@ export default defineConfig({
 	server: {
 		port: 3001,
 	},
+	envDir: "../../packages/env",
 });