Removes the unnecessary NimBLECharacteristicCallbacks::Status enum and callback parameter from NimBLECharacteristic::onStatus.
This was maintained for compatibility with the Arduino BLE library and is not necessary as the return code from the stack is also provided.
* Update examples/docs.
Changes all functions that accept a time parameter to use milliseconds instead of seconds.
* Adds duration input to NimBLEDevice::startAdvertising and NimBLEServer::startAdvertising.
