Add colors to Telegram notifications#293

It would be great if all Telegram notification messages had specific colors, or color emojis, to indicate various statuses like profit or loss, so I can scroll quickly and see everything at a glance.

For example, I only have “Closed” notifications enabled for DCA bots and I still receive hundreds or thousands of messages on some days, and both profit and loss look the same. It would be nice if profit had a green color, loss had an orange color, and errors had a red color, etc.