Specific `_*all` and `_*all_with` functions were implemented to make
the API more concise and clean, and to replace the use of
`RELAY_CHN_ID_ALL`, which caused confusion within the API.
Refs #1085
- Introduced configuration options for enabling run limits in Kconfig.
- Added APIs to get and set run limits for individual relay channels.
- Implemented run limit timer functionality to automatically stop channels.
- Updated NVS handling to store and retrieve run limit values.
- Enhanced documentation in README and code comments to reflect new feature.
Closes #1080
- Added new utility script run_tests_all_cfgs.sh to run tests for all configurations and with test tag support.
- Updated run_tests.sh to add the new test tag for NVS unit tests.
