feat: Simple nodemailer integration

package.json

@@ -37,6 +37,7 @@
     "cache-manager": "^7.2.8",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.14.3",
+    "nodemailer": "^8.0.1",
     "pg": "^8.18.0",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1"
@@ -54,6 +55,7 @@
     "@types/express": "^5.0.0",
     "@types/jest": "^29.5.14",
     "@types/node": "^22.10.7",
+    "@types/nodemailer": "^7.0.11",
     "@types/pg": "^8.16.0",
     "@types/supertest": "^6.0.2",
     "eslint": "^9.18.0",