Add RAIOT_MQTT library

[Ultimate-raio01]

Adding the RAIOT_MQTT library for the RAIOTerm.cc IoT platform.

[github-actions]

A problem was found with your submission https://github.com/raiotech-iot/RAIOTerm.git

❌ ERROR: Submission URL is already in the Library Manager index.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/raiotech-iot/RAIOT_MQTT.git:

Linting library in RAIOT_MQTT
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)                                                                                          
WARNING: No readme found. Please document your library.                                                                                
         See:                                                                                                                          
         https://docs.github.com/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-readmes
         (Rule LD001)                                                                                                                  

Linter results for project: 0 ERRORS, 2 WARNINGS

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Linting sketch in RAIOT_MQTT/examples/RAIOT_MQTT_Receiver

Linter results for project: no errors or warnings

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

Linting sketch in RAIOT_MQTT/examples/RAIOT_MQTT_Sender

Linter results for project: no errors or warnings

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

Linter results for projects: 0 ERRORS, 2 WARNINGS

[github-actions]

Thanks for your interest in contributing to the Arduino Library Manager index @Ultimate-raio01
Please resolve the error(s) mentioned in the previous comment.

After resolving the issue, trigger this check again by doing one of the following:

• Commit the required change to the branch you submitted this pull request from.
• Comment here, mentioning @ArduinoBot in the comment.

❗ NOTE: It is not necessary to open a new pull request. ❗

More information:
https://github.com/arduino/library-registry/blob/main/README.md#if-the-problem-is-with-the-pull-request

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/raiotech-iot/RAIOT_MQTT.git:

Linting library in RAIOT_MQTT
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)                                                                                          
WARNING: No readme found. Please document your library.                                                                                
         See:                                                                                                                          
         https://docs.github.com/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-readmes
         (Rule LD001)                                                                                                                  

Linter results for project: 0 ERRORS, 2 WARNINGS

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

Linting sketch in RAIOT_MQTT/examples/RAIOT_MQTT_Receiver

Linter results for project: no errors or warnings

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

Linting sketch in RAIOT_MQTT/examples/RAIOT_MQTT_Sender

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/raiotech-iot/RAIOT_MQTT/