New Slack /fh learn Command and a Big Shipment of Improvements

This week's FireHydrant update introduces a new `/fh learn` Slack command to onboard and educate users on incident management workflows. Alongside this, numerous improvements have been made to the platform including API access to call routes, UI resilience with signals, and enhanced error handling for imports and form submissions. Several bug fixes were also implemented, improving the overall user experience across various features and devices.