Add icons for Hapi, Nest.js, Fastify

[AbhiPrasad]

With v8 we're adding support for some new frameworks. Let's add icons for them!

Hapi - https://hapi.dev/

Small Icon: https://twitter.com/hapijs/photo

Full Icon: https://raw.githubusercontent.com/hapijs/assets/master/images/hapi.png

Nest.js - https://nestjs.com/

Fastify - https://fastify.dev/

https://github.com/fastify/graphics

full icon: https://github.com/fastify/graphics/blob/master/full-logo.png

small icon: https://github.com/fastify/graphics/blob/master/short-logo.png