feat(esp_schedule): v2.0.0 (IEC-408)

[Junius00]

Checklist

• Component contains License
• Component contains README.md
• Component contains idf_component.yml file with url field defined
• Component was added to upload job
• Component was added to build job
• Optional: Component contains unit tests
• CI passing

Change description

Added in v2.0.0:

• Make NVS usage optional via Kconfig
• Refactor trigger logic:
  • Allow more than one trigger per schedule
  • More flexible date constraints
• Add glue layer for NVS, timer, time, memory allocation, logging implementations used by component:
  • This is necessary for RMNG, which has to compile under normal CMake conditions and cannot rely on ESP-IDF
  • Component still behaves like a normal ESP-IDF component with default implementations
• Add Unity test app