feat: @RawBody decorator

[leandro-costa-oliveira]

Description

Adds a new decorate RawBody, that returns the body of the request unparsed, useful for validating webhook signatures (Stripe, Asaas, Mercado Pago, GitHub, etc.).

Checklist

• the pull request title describes what this PR does (not a vague title like Update index.md)
• the pull request targets the default branch of the repository (develop)
• the code follows the established code style of the repository
  • npm run prettier:check passes
  • npm run lint:check passes
• tests are added for the changes I made (if any source code was modified)
• documentation added or updated
• I have run the project locally and verified that there are no errors

Fixes

N/A