Integration with Nest

### Owner note
[Scroll to `typegraphql-nestjs` package info ⬇️](https://github.com/MichalLytek/type-graphql/issues/135#issuecomment-606199943)

## Original post
I was wondering if there could be more support for Nest.js, in particular, integration with an authorization endpoint is needed. Right now, I'm using [this NPM package](https://www.npmjs.com/package/nestjs-type-graphql) + TypeORM, following the sample, so far so good but unfortunately the source was nowhere to be found, and so I have to workaround my auth checker which required me to pass the database module into the context but it is very dangerous. So what about an official extension of TypeGraphQL to Nest.JS? This would make it easier to write universal services.

Start with the linked owner note for the `typegraphql-nestjs` package information, then compare the referenced `nestjs-type-graphql` package and its sample. Clarify the scope of official Nest.js integration, especially authorization endpoints and safely passing database access through the context; done means an agreed extension design and documented integration path.

Written by the indexing model from the issue text.