It turned out that esp_event was adding extra complexity to the code base and it was completely unnecessary. So it has been removed from the component completely. The actions are now executed directly in the `relay_chn_distpacth_cmd()` and `relay_chn_tilt_dispatch_cmd()` functions.
This change has simplified the component as well as reduced the memory footprint.
Fixes #1084, refs #1083
- Introduced NVS configuration options in Kconfig.
- Implemented NVS initialization and deinitialization in relay_chn_core.
- Added functions for storing and retrieving relay channel direction and tilt sensitivity in NVS.
- Updated relay_chn_tilt and relay_chn_output to utilize NVS for state management.
- Created relay_chn_nvs.c and relay_chn_nvs.h for NVS-related functionalities.
Closes #1074.
Restructure the whole project tree so that the component can be unit tested. Also update some cmake files to update the modified paths, update test cases etc.
