- Replaced the buggy, oldschool, plain pointer based list approach with more robust FreeRTOS linked list implementation for the listener API. Fixes #1049.
- Added relevant test cases. Refs #1030.
The component allocates resources (timers, event loop) in relay_chn_create but never frees them. This is a resource leak.
Hence, a destroy function added to free the resources gracefully.
Fixes #1048.
