Add nestjs-doctor - static analysis tool for NestJS

[Franciscuo]

GitHub: https://github.com/RoloBits/nestjs-doctor

• I have not changed the README.md directly.

Adds nestjs-doctor to the TypeScript/JavaScript category via data/tools/nestjs-doctor.yml.

nestjs-doctor is a static analysis tool purpose-built for NestJS applications:

• 50+ built-in rules covering security, performance, correctness, and architecture
• 0-100 health score with actionable diagnostics
• Module graph visualization and endpoint dependency graphs
• Database schema analysis (Prisma, TypeORM, Drizzle)
• Zero config, monorepo support
• CLI and VS Code extension
• MIT licensed, 90+ GitHub stars