Added large document tests to Surreal DB

[Du-z]

Note: This PR relies on fixes in #82 #95 to work, merge this one after it is completed.

The tests don't currently push past the limit outlined below:

For REST is looks like there is a limit in SurrealDB somewhere between 31238 bytes and 57862 bytes.

{
    "code": 413,
    "details": "Payload too large",
    "description": "The request has exceeded the maximum payload size. Refer to the documentation for the request limitations."
}

For RPC there seems to be a limit somewhere between 17926 bytes and 31238 bytes.

System.Net.WebSockets.WebSocketException
The remote party closed the WebSocket connection without completing the close handshake.
   at System.Net.WebSockets.ManagedWebSocket.ReceiveAsyncPrivate[TResult](Memory`1 payloadBuffer, CancellationToken cancellationToken)

[ProphetLamb]

@Du-z Did you mean #95 instead of #82, Things with JSON keys?

[Du-z]

@ProphetLamb Yeah your right, when #95 is merged.

[ProphetLamb]

Looking good

[ProphetLamb]

@Du-z We have the Bogus package installed IIRC, this can be used to generate UNICODE dummy data, instead of a manual impl. Bogus is to .NET what faker is to JS