feat: add websocket module to py-sdk

[matthiasmatt]

Fix #116

With this, user can now open websocket object and have a multiprocessing queue filled with events:

from nibiru.websocket import Events

ws = NibiruWebsocket(
    network,
    captured_events_type=[
        Events.MarkPriceChanged,
        Events.PositionChangedEvent,
    ],
)
ws.start() # async start the process

Events included are:

Perp events

• PositionChangedEvent = "nibiru.perp.v1.PositionChangedEvent"
• PositionLiquidatedEvent = "nibiru.perp.v1.PositionLiquidatedEvent"
• FundingRateChangedEvent = "nibiru.perp.v1.FundingRateChangedEvent"
• PositionSettledEvent = "nibiru.perp.v1.PositionSettledEvent"

Vpool events

• ReserveSnapshotSavedEvent = "nibiru.vpool.v1.ReserveSnapshotSavedEvent"
• SwapQuoteForBaseEvent = "nibiru.vpool.v1.SwapQuoteForBaseEvent"
• MarkPriceChanged = "nibiru.vpool.v1.MarkPriceChanged"

[onikonychev]

Question: is there any event deserialization so far? Will user get price as float or as a string? Or this is a scope if the next PR?
And it looks tests are failing.

[matthiasmatt]

Question: is there any event deserialization so far? Will user get price as float or as a string? Or this is a scope if the next PR? And it looks tests are failing.

I'll do that in another PR. I'll tie in the deserialization with the #118 and #119 so we can leverage proto to already know the types of the fields

[onikonychev]

Changes look good but tests are still failing.