Add RAKwireless_RAK14000_EPD_2_13

[beegee-tokyo]

New library for usage with RAKwireless RUI3 devices and RAK14000 EPD display.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/beegee-tokyo/RAKwireless_RAK14000_EPD_2_13:

Linting library in RAKwireless_RAK14000_EPD_2_13
INFO: No header file found matching library name (RAK14000_EPD.h). Best practices are for primary header filename to    
      match library name.                                                                                               
      See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format            
      (Rule LS008)                                                                                                      
WARNING: Missing architectures field in library.properties                                                     
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP043)                                                                                          

Linter results for project: 0 ERRORS, 1 WARNINGS

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Linting sketch in RAKwireless_RAK14000_EPD_2_13/examples/Text-Image

Linter results for project: no errors or warnings

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Linter results for projects: 0 ERRORS, 1 WARNINGS

[github-actions]

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