chore: update spring-boot to latest & add Gradle package manager

[ayewo]

This PR includes the following updates:

• updates the Treblle SDK to use the latest version of Spring Boot (3.2.1);
• bumps the Treblle SDK version from 2.0.0 to 2.1.0;
• adds another package manager (Gradle) alongside the existing package manager (Maven).

@JustSteveKing Please take a look when you have a moment.

[cindreta]

Hey @ayewo thx so much for making the PR. @IvoMajic Is gonna review and merge 🔥

[IvoMajic]

Everything seems fine in terms of bumping Spring...except for the Gradle addition, I do not see a point unless the project switches the whole Sonatype publishing to it (maintaining two build systems is not the goal)

[ayewo]

@IvoMajic

Thanks for finally taking a look.

1. Should I remove the Gradle addition then?
2. Will this https://github.com/Treblle/springboot-api-boilerplate also need updating to use the updated Spring Boot and Treblle SDK?

[IvoMajic]

Yes, you can remove the Gradle stuff and leave just the Spring upgrade. That can then go as a minor version bump eg. 2.1.0. The boilerplate decision I leave to @cindreta

[ayewo]

@IvoMajic this is ready for review.

@cindreta can you please comment if you'd like to also update the code in the https://github.com/Treblle/springboot-api-boilerplate repo?

Thanks

[ayewo]

@IvoMajic have you had a chance to look?

@cindreta waiting on your answer this?

[JustSteveKing]

@cindreta could we get some movement on this please?