Added roo_material_icons.

[dejwk]

No description provided.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/dejwk/roo_material_icons:

Linting library in roo_material_icons
WARNING: library.properties name value roo_material_icons 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.properties depends field item(s) roo_display not found in the Library Manager index.          
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP048)                                                                                          
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, 3 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/dejwk/roo_material_icons/