chore: upgrade to react-email 6 (#18)

Author: joaopcm

emails/welcome.tsx

@@ -10,7 +10,7 @@ import {
   Section,
   Tailwind,
   Text,
-} from '@react-email/components';
+} from 'react-email';
 import { createIntl } from 'react-intl';
 
 interface WelcomeProps {

package.json

@@ -6,16 +6,15 @@
     "export": "email export"
   },
   "dependencies": {
-    "@react-email/components": "1.0.1",
+    "@react-email/ui": "6.0.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "react-intl": "^7.1.14"
   },
   "devDependencies": {
-    "@react-email/preview-server": "5.0.5",
     "@types/react": "^19.0.1",
     "@types/react-dom": "^19.0.1",
-    "react-email": "5.0.5",
+    "react-email": "6.0.0",
     "typescript": "^5.9.3"
   }
 }