Add more examples (pydantic, fastapi, etc)

[grigoriev-semyon]

I see you don't have rules for new contributors, so I'll ask first. Would it be nice if I make a pull request with my experience in using pydrive2 with technologies: pydantic, fastapi? (new example) There is not much code, but maybe it will help someone

[shcheklein]

hi @grigoriev-semyon yes, any examples are good to have I think.