Add ChipNorm_LED_Matrix library

[chipnorm]

No description provided.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/chipnorm/LED_Matrix:

Linting library in LED_Matrix
WARNING: A commonly misspelled word was found in the library.properties sentence field. Suggested correction: Library   
         for the LED Matrix Max7219. To control it easily.                                                              
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format         
         (Rule LP033)                                                                                                   
WARNING: Invalid category field value Displays in library.properties                                           
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP038)                                                                                          
WARNING: Unable to load the library.properties url field: 404 Not Found                                        
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP042)                                                                                          

Linter results for project: 0 ERRORS, 3 WARNINGS

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Linting sketch in LED_Matrix/examples/ESP32_LED_Matrix_MAX7219_ChipNorm

Linter results for project: no errors or warnings

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

Linter results for projects: 0 ERRORS, 3 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/chipnorm/LED_Matrix/