Add BLE OTA Firmware Update library

[Raghav117]

Adds BLE OTA Firmware Update library for ESP32 devices.

This library provides:

• BLE OTA firmware updates
• Configurable UUIDs
• Progress monitoring
• Command interface
• Error handling

Repository: https://github.com/Raghav117/bluetooth_ota_firmware_update

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/Raghav117/bluetooth_ota_firmware_update.git:

Linting library in bluetooth_ota_firmware_update
INFO: No header file found matching library name (BLE_OTA_Update.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 BLE OTA Update 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 depends field item(s) Arduino, BLEDevice, Update not found in the Library Manager index.
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format     
         (Rule LP048)                                                                                               

Linter results for project: 0 ERRORS, 2 WARNINGS

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Linting sketch in bluetooth_ota_firmware_update/examples/AdvancedExample

Linter results for project: no errors or warnings

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Linting sketch in bluetooth_ota_firmware_update/examples/BasicExample

Linter results for project: no errors or warnings

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Linting sketch in bluetooth_ota_firmware_update/examples/CustomUUIDs

Linter results for project: no errors or warnings

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Linting sketch in bluetooth_ota_firmware_update/examples/RobotOTAExample

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/Raghav117/bluetooth_ota_firmware_update/