add M5Atomic-EchoBase lib

[Gitshaoxiang]

add M5Atomic-EchoBase lib

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/m5stack/M5Atomic-EchoBase:

Linting library in M5Atomic-EchoBase
INFO: No header file found matching library name (M5Atomic-EchoBase.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: Invalid category field value Sensor in library.properties                                             
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP038)                                                                                          
WARNING: Sketch(es) found outside examples and extras folders:                                    
           M5Atomic-EchoBase/example/RecordPlay                                                   
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-examples
         (Rule LD003)                                                                             
WARNING: Potentially misspelled examples folder name found: M5Atomic-EchoBase/example             
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-examples
         (Rule LD005)                                                                             

Linter results for project: 0 ERRORS, 3 WARNINGS

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

Linting sketch in M5Atomic-EchoBase/example/RecordPlay

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/m5stack/M5Atomic-EchoBase/