Use subscription approach to retrieve market data instead of watch method inside a loop

[bludnic]

This feature is not yet supported by CCXT.

Instead of:

while (true) {
  try {
    const ticker = await exchange.watchTicker("BTC/USDT");
  } catch (err) {
    // ...
  }
}

Use subscription:

const handleTicker = (ticker) => {
  // ...
}

exchange.onTicker("BTC/USDT", handleTicker)
exchange.offTicker("BTC/USDT", handleTicker)

Same approach for watchOrderbook and watchTrades.

Discussion:
ccxt/ccxt#15188
ccxt/ccxt#9248 (comment)