Add ThingworxESP32 library

[dvelaren]

I created a ESP32 library to be able to send HTTP request to Thingworx Platform 9.x.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/dvelaren/ThingworxESP32:

Linting library in ThingworxESP32
INFO: No header file found matching library name (Thingworx_ESP32.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 Thingworx ESP32 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: The library.properties paragraph field repeats the sentence field. These are displayed together so redundancy  
         is not needed.                                                                                                 
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format         
         (Rule LP036)                                                                                                   

Linter results for project: 0 ERRORS, 2 WARNINGS

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Linting sketch in ThingworxESP32/examples/getThingworx

Linter results for project: no errors or warnings

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Linting sketch in ThingworxESP32/examples/getThingworxJSONLib

Linter results for project: no errors or warnings

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Linting sketch in ThingworxESP32/examples/postThingworx

Linter results for project: no errors or warnings

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

Linter results for projects: 0 ERRORS, 2 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/dvelaren/ThingworxESP32/