[FASTIFY] Map Fastify Request fo PlatformFastifyRequest
### Is your feature request related to a problem? Please describe.

Related: https://github.com/tsedio/tsed/issues/932

PlatformFastifyRequest is responsible to map FastifyRequest methods to our Fastify adapter for Ts.ED framework.

The goals is to implement all required PlatformRequest methods in PlatformFastifyRequest.

### Acceptance criteria

- [ ] PlatformFastifyResponse methods are covered by unit tests