Add Quart integration

[hrimov]

Adds integration for the Quart framework, including websockets. The implementation follows the Flask integration pattern due to their similar APIs.

[Tishka17]

That's a create job, thank you. I am not sure, we need more web-frameworks as a mainstream integration. What do you think about publishing as a separate project? We had an internal discussion last year about community driven integration, so probably time has come to start doing it.

What I suggest:

• you prepare a separate github repository under your control.
• you publish as a separate project on pypi (name like dishka-quart whould be ok)
• we add a link to your project into dishka documentation

Based on this work we can together prepare a template repo for future integrations.

What do you think about this approach?

[hrimov]

I see... I just want to say that my main motivation for creating this integration was to better understand dishka's internals :) But I guess it wouldn't be a problem to create a separate package for it.

However, what is the main point of proceeding with community-driven integrations? Is it because of the lack of "free hands" or due to the desire to make the distribution more lightweight?