feat: integrate Prisma ORM and enhance Nuxt.js setup

- Add Prisma schema for User and PasswordReset models
- Include .env.example with DATABASE_URL and URL placeholders
- Update nuxt.config.ts for extended Nuxt UI and enhanced devtools
- Modify .gitignore to exclude Prisma database files
- Add initial Prisma migration SQL script
- Update package.json to include Prisma, bcrypt, and related types