feat: add mailing dependencies to support email functionality

Added `@nestjs-modules/mailer`, `nodemailer`, and their respective types to backend dependencies for implementing email services. Updated `pnpm-lock.yaml` to reflect these changes.

backend/package.json

@@ -24,6 +24,7 @@
 		"db:studio": "drizzle-kit studio"
 	},
 	"dependencies": {
+		"@nestjs-modules/mailer": "^2.0.2",
 		"@nestjs/common": "^11.0.1",
 		"@nestjs/config": "^4.0.2",
 		"@nestjs/core": "^11.0.1",
@@ -34,6 +35,7 @@
 		"drizzle-orm": "^0.45.1",
 		"jose": "^6.1.3",
 		"minio": "^8.0.6",
+		"nodemailer": "^7.0.12",
 		"pg": "^8.16.3",
 		"reflect-metadata": "^0.2.2",
 		"rxjs": "^7.8.1"
@@ -45,6 +47,7 @@
 		"@types/express": "^5.0.0",
 		"@types/jest": "^30.0.0",
 		"@types/node": "^22.10.7",
+		"@types/nodemailer": "^7.0.4",
 		"@types/pg": "^8.16.0",
 		"@types/supertest": "^6.0.2",
 		"drizzle-kit": "^0.31.8",