Nicer way to create ThingClients and interact with server. #265
Description
We can use ThingClient.from_url but f we have lots of things on the same server then we want to use the same httpx.Client, but actually knowing what is on the server we can looks the Thing Descriptions. It may be nice to have some form of LabThingsClient or ServerConnection or something with a better name so I create a connection and ask that connection for the ThingClients in cleaner code:
>>> microscope = lt.remote_connection("http://microscope.local:5000")
>>> microscope.available_things
["camera", "stage", "syestem"]
>>> stage_client = microscope.get_thing_client("camera")
>>> stage_client.position
{"x": 0, "y": 0, "z": 0}