Add IM19 IMU Library

[nseidle]

No description provided.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/sparkfun/SparkFun_IM19_IMU_Arduino_Library:

Linting library in SparkFun_IM19_IMU_Arduino_Library
WARNING: library.properties name value SparkFun IM19 IMU Arduino Library 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: Library name SparkFun IM19 IMU Arduino Library contains "Arduino". This is superfluous.               
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP014)                                                                                          
WARNING: library.properties name SparkFun IM19 IMU Arduino Library contains spaces. Although supported, best practices  
         is to not use spaces.                                                                                          
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format         
         (Rule LP015)                                                                                                   
WARNING: Library name SparkFun IM19 IMU Arduino Library contains "library". This is superfluous.               
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP016)                                                                                          
WARNING: No example sketches found. Please provide examples.                                      
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-examples
         (Rule LD004)                                                                             

Linter results for project: 0 ERRORS, 5 WARNINGS

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[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/sparkfun/SparkFun_IM19_IMU_Arduino_Library/