Feature request: SQLAlchemy async

Describe the feature

It would be great to provide a SQLAlchemy async demo, thanks!

SQLAlchemy says it supports async since version 1.4

This repo readme says

trino.sqlalchemy is compatible with the latest 1.3.x and 1.4.x SQLAlchemy versions at the time of release of a particular version of the client.

https://docs.sqlalchemy.org/en/20/orm/extensions/asyncio.html

However, I cannot make them work.

I guess for SQLAlchemy, I need install

pip install sqlalchemy[asyncio]

This repo I need run

pip install trino[sqlalchemy]

Apparently, this does not exist 🥲

pip install trino[sqlalchemy[asyncio]]

I guess it may be blocked by this https://github.com/trinodb/trino-python-client/issues/3 (?)

Describe alternatives you've considered

Use https://github.com/mvanderlee/aiotrino instead. However, it would be great to support async officially including SQLAlchemy async. Thanks!

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Start with the existing trino[sqlalchemy] installation path and the SQLAlchemy asyncio documentation linked in the issue. Review the README compatibility statement and determine the scope of official async SQLAlchemy support. Done should include a working async SQLAlchemy demonstration and documented installation instructions.