Issue warning when gevent used with free-threaded python #811
Description
Reading the gevent docs, though, my understanding is that using gevent will simply enable the GIL, so maybe a warning would be more appropriate when
dramatiq-geventis run in a free-threading Python.
Originally posted by @Bogdanp in #785 (comment)
We should add a check to detect free-threaded python in the gevent entry point files (dramatiq-gevent and pytest-gevent.py), and issue a python warning when it is detected.