Add Arduino_LowPowerPortentaC33 library

[sebromero]

No description provided.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/arduino-libraries/Arduino_LowPowerPortentaC33:

Linting library in Arduino_LowPowerPortentaC33
WARNING: library.properties name value Arduino_LowPowerPortentaC33 is longer than the recommended length of 16          
         characters.                                                                                                    
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format         
         (Rule LP010)                                                                                                   
WARNING: No license file found.                                                                                                                 
         See:                                                                                                                                   
         https://docs.github.com/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/licensing-a-repository
         (Rule LD002)                                                                                                                           

Linter results for project: 0 ERRORS, 2 WARNINGS

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Linting sketch in Arduino_LowPowerPortentaC33/examples/WakeFromPin

Linter results for project: no errors or warnings

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Linting sketch in Arduino_LowPowerPortentaC33/examples/WakeFromRTC

Linter results for project: no errors or warnings

-------------------

Linter results for projects: 0 ERRORS, 2 WARNINGS

[github-actions]

Your submission has now been accepted! Thanks for your contribution to the Arduino Library Manager index.

The library(s) will be available for installation via Library Manager within a day's time.

You can check the logs from the Library Manager indexer for your library(s) here:
http://downloads.arduino.cc/libraries/logs/github.com/arduino-libraries/Arduino_LowPowerPortentaC33/