Sends a command to the Redis server and returns the raw reply.

Example:

const redisConn = await Deno.connect({ port: 6379 });

const value = new Uint8Array([0, 1, 2, 1, 2, 1, 2, 3]);

// Returns "OK"
await sendCommand(redisConn, ["SET", "binary", value]);

// Returns Uint8Array(8) [0, 1, 2, 1, 2, 1, 2, 3]
await sendCommandRawReply(redisConn, ["GET", "binary"]);