Add nestjs-express and nestjs-fastify

[rennanboni]

Hi,

I really liked how you guys did handle benchmarks - congratulations

Just added support to nestjs with express and fastify adapters and gave me a really interesting data for comparison, please checkout

The code used for nestjs-express and nestjs-fastify are just like the others samples nestjs-express - https://github.com/rennanboni/benchmarks-nestjs-express nestjs-fastify - https://github.com/rennanboni/benchmarks-nestjs-fastify

[Eomm]

This would be a nice addition - would you mind to revamp this PR?