Add rate limiter utility snippet

[iluwatar]

Description:

A token bucket rate limiter is an algorithm used to control how often actions can occur, typically used in APIs, background jobs, or other systems to avoid overuse or abuse.

Implement a simple token bucket–style rate limiter. It should allow only a certain number of operations per second.

Acceptance Criteria:

• A new rate limiter snippet has been added
• Test example demonstrates throttling effect

[nour-awad]

hello @iluwatar, can you assign me to his issue?

[jsubhankar]

Hello @iluwatar,

I've created a Pull Request #264 for rate limiter snippet.

But Build failed for this PR due to >Task Sonarqube FAILED
In local run for - ./gradlew clean build - no sonarqube task was executed, seems it only related to github PR creation.

Please help to address this Sonarqube error in PR Build
and check if my snippet change is meeting #248 issue description.

Thanks and Regards,
Subhankar Jana