Add RPS control with ramp-up for tuple writes

[Siddhant-K-code]

Description

This PR adds support for specifying RPS (Requests Per Second) for writes while allowing for ramp-up over a period of time. It implements the following features:

• Adds three new flags to the tuple write and tuple import commands:

  • min-rps: Minimum requests per second for writes
  • max-rps: Maximum requests per second for writes
  • rampup-period-in-sec: Period in seconds to ramp up from min-rps to max-rps

• These flags are optional by default, but if one is provided, all three are required with positive values

• When these flags are provided, the SDK:

  • Starts writing tuples at the min-rps rate
  • Gradually increases to max-rps over the specified rampup period
  • If all tuples are written before the rampup period ends, the command exits
  • If the rampup period ends and there are still tuples to write, the command continues writing at the max-rps rate until all tuples are written

Testing

Added a test case to verify the RPS control functionality. The test ensures that:

• The rate limiting works as expected
• The duration of the write operation is consistent with the specified RPS parameters

References

fixes #463

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• The correct base branch is being used, if not main
• I have added tests to validate that the change in functionality is working as expected

[Siddhant-K-code]

ahh! I just saw that the issue was already In-progress in the SDK board. Closing this