feat: create lib to handle file upload for Fastify-based apps

[getlarge]

To solve this issue some solutions already exist:

• @nest-lab/fastify-multer developed by one of the NestJS core team members
• nest-file-fastify

@nest-lab/fastify-multer depends on fastify-multer, which is abandoned and not maintained anymore ❌

nest-file-fastify depends on fastify-multipart, and the Fastify team maintains it. But nest-file-fastify is outdated and unmaintened. ❌

This lib will fork nest-file-fastify and update the fastify-multipart dependency to the latest version.

[JoCat]

👍