Allow creating RM instance outside asyncio context.

[dmgav]

Implemented a feature, which allows to create instance of async RM outside asyncio context:

from bluesky_queueserver_api.zmq.aio import REManagerAPI
from bluesky.callbacks.best_effort import BestEffortCallback
import bluesky.plan_stubs as bps
import asyncio


if __name__ == "__main__":

    RM = REManagerAPI(
        zmq_control_addr="tcp://localhost:60615",
        zmq_info_addr="tcp://localhost:60625",
    )

    async def test():
        rep = await RM.status()
        print(f"{rep=}")

    f = asyncio.run_coroutine_threadsafe(test(), loop=RM.loop)
    f.result(timeout=None)

Now async RM may be easily instantiated using event loop created by Run Engine. Then RM object may be used from Bluesky plans to communicate with Queue Server.

    RE = RunEngine()
    RM = REManagerAPI(
        zmq_control_addr="tcp://localhost:60615",
        zmq_info_addr="tcp://localhost:60625",
        loop = RE.loop
    )

Motivation and Context

The feature was implemented to address #48 and may be useful for #49.

Summary of Changes for Release Notes

Fixed

Added

• New parameter loop was added to async versions of REManagerAPI. The parameter may be used to instantiate the object outside asyncio context. For example, REManagerAPI may be instantiated directly Bluesky startup code using the event loop created by Bluesky Run Engine.

Changed

Removed

How Has This Been Tested?

Unit tests were added.