Kraken Spot L3_BOOK Support

[volemont]

Is your feature request related to a problem? Please describe.
N/A

Describe the solution you'd like
Kraken Spot Websockets (v2) supports level 3 market-by-order data. Support L3_BOOK for exchange Kraken in cryptofeed.

Describe alternatives you've considered
N/A

Additional context

• https://docs.kraken.com/api/docs/websocket-v2/level3
• https://docs.kraken.com/api/docs/guides/spot-ws-l3-v2