- Implemented the incoming webhook API to handle alerts from external applications. - Added configuration options for webhook listening address, port, and endpoints in config.go. - Created WebhookReceiverConfig and WebhookEndpointConfig structures to manage webhook settings. - Developed WebhookHandler to process incoming requests, validate tokens, and deliver alerts to specified channels. - Enhanced existing controller interfaces to support alert delivery. - Updated message rendering to respect Markdown settings for different channels. - Added tests for webhook functionality and ensured proper error handling.