"Command not recognised" causes confusion on TelegramAdapter
With TelegramAdapter we have two identifiers: '!' for historic reason, and '/' to support the official "command" recognised inside Telegram and Telegram Bot API. The current criteria for unknown commands is when there is an identifier but no matching command exists. This causes confusion with '/' identifier when there's multiple bots in a single group, as these command may match other bot's command. FYI, the Telegram Bot API does not display messages from other bots, so we have no idea whether the other bot is responding or not.