Update ledc duty cycle value range in doxygen. Fix duty configuration error at 100% duty cycle for ESP32. Improve LEDC API doxygen. Closes https://github.com/espressif/esp-idf/pull/11516 Closes https://github.com/espressif/esp-idf/issues/12083
Changes on the ledc_init function Review on the README, docs and example functions Added how to set freq and duty on README Fix on the ledc.rst docs in the App Example Added new example reference in the Chinese docs