Added UM RGB Touch Mini helper library.

[UnexpectedMaker]

New helper library and examples for Unexpected Maker RGB Touch Mini.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/UnexpectedMaker/RGB-Touch-Mini-Arduino-Helper:

Linting library in RGB-Touch-Mini-Arduino-Helper
INFO: No header file found matching library name (UM_RGB_Touch_Mini.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: library.properties name value UM RGB Touch Mini 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 name UM RGB Touch Mini 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.properties version value 1.0 is not compliant with the semver specification.
         See: https://semver.org/                                                            
         (Rule LP021)                                                                        
WARNING: library.properties depends field item(s) Adafruit_MPR121, FastLED_Matrix 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) RGB_Touch_Mini not found in library.                        
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP052)                                                                                          
WARNING: Incorrect Arduino.h filename case in #include directive: RGB-Touch-Mini-Arduino-Helper/RGB_Touch_Mini.h:3:     
         #include "arduino.h" (Rule LC001)                                                                              

Linter results for project: 0 ERRORS, 6 WARNINGS

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

Linting sketch in RGB-Touch-Mini-Arduino-Helper/examples/Basics

Linter results for project: no errors or warnings

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

Linting sketch in RGB-Touch-Mini-Arduino-Helper/examples/Touch_Spirals
WARNING: Incorrect Arduino.h filename case in #include directive:                                                       
         RGB-Touch-Mini-Arduino-Helper/examples/Touch_Spirals/spirals.h:22: #include "arduino.h" (Rule SC001)           

Linter results for project: 0 ERRORS, 1 WARNINGS

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

Linter results for projects: 0 ERRORS, 7 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/UnexpectedMaker/RGB-Touch-Mini-Arduino-Helper/