Continue development of the ble-temp-switcher application created during Setup.
Requirements:
1. Run on nrf54l15dk/nrf54l15/cpuapp.
2. Read the silicon-die temperature periodically and send it to a smartphone over Bluetooth LE.
3. Allow the smartphone to turn each DK LED on and off independently.
4. Keep UART enabled for debugging.
5. Print the temperature periodically and log every LED action.
6. Select suitable Bluetooth LE services and characteristics.
7. Follow the code guidance resources selected by Nordic MCP while implementing and reviewing the application.
Inspect the existing project before making changes.
Build the application and ask before programming the device.
Test the Bluetooth LE and UART behavior.