[WIP] Add simple Python websocket client for blockchain API

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

Simple python websocket client

https://github.com/websocket-client/websocket-client

from websocket import create_connection
options = {}
options['origin'] = 'https://exchange.blockchain.com'
url = "wss://ws.blockchain.info/mercury-gateway/v1/ws"
ws = create_connection(url, **options)
msg = '{"token": "{API_SECRET}", "action": "subscribe", "channel": "auth"}'
ws.send(msg)
result = ws.recv()
print(result)

{ "seqnum":0,

"event":"subscribed",

"channel":"auth",

"readOnly":false }

ws.close()

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[Kushmanmb]

kushmanmb