add SCL3400 lib

[vasutornjays]

SCL3400 lib

This is the initial release of the SCL3400 Arduino library which was modified from the SCL3300 lib (https://github.com/DavidArmstrong/SCL3300), providing support for the SCL3400 inclinometer sensor.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/vasutornjays/SCL3400:

Linting library in SCL3400
WARNING: library.properties depends field item(s) SPI not found in the Library Manager index.                  
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP048)                                                                                          
WARNING: library.properties includes field item(s) SPI.h not found in library.                                 
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP052)                                                                                          

Linter results for project: 0 ERRORS, 2 WARNINGS

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Linting sketch in SCL3400/examples/SCL3400_Read_XY_Tilt

Linter results for project: no errors or warnings

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Linter results for projects: 0 ERRORS, 2 WARNINGS

[github-actions]

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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/vasutornjays/SCL3400/