feat(rust-sdk): Introduce Rust SDK

[booniepepper]

• feat(rust): 'make setup-new-sdk' for Rust
• chore(rust-sdk): Add build/test with docker to Makefile
• chore(rust-sdk): Update config overrides
• clean(rust-sdk): Remove unused HTTP library

Description

References

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