feat($retry): enable capped exponential backoff and jitter via keyword arguments

[RainrainWu]

Summary

• Enable exponential backoff via keyword arguments.

Checklist

• [x] Implement unit test cases.

Reason

• Currently, the feature supports highly customized retry intervals via a pass-in callable argument.
• However, it's hard to comprehend that the argument timeout can also accept a callable object without tracing the source code.
• Capped exponential backoffs and jitter are already well-known approaches, maybe you can consider making them specific features via keyword arguments.