llmkit 0.1.3

Production-grade LLM client - 100+ providers, 11,000+ models. Pure Rust.
Documentation
## Description

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## Type of Change

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- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
- [ ] Documentation update
- [ ] Performance improvement
- [ ] Code refactoring
- [ ] Tests
- [ ] CI/CD changes

## Related Issues

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Fixes #

## Changes Made

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-
-
-

## Testing

<!-- Describe the tests you ran to verify your changes -->

- [ ] I have added tests that prove my fix is effective or that my feature works
- [ ] All new and existing tests pass locally
- [ ] I have run `cargo test --all-features`
- [ ] I have run `cargo clippy -- -D warnings`
- [ ] I have run `cargo fmt`

## Python Bindings (if applicable)

- [ ] Python bindings updated (if needed)
- [ ] Python tests pass (`cd llmkit-python && pytest`)
- [ ] Python code formatted with `ruff format`
- [ ] Python code linted with `ruff check`

## Node.js Bindings (if applicable)

- [ ] Node.js bindings updated (if needed)
- [ ] Node.js tests pass (`cd llmkit-node && npm test`)
- [ ] Code formatted with `prettier`

## Documentation

- [ ] I have updated the documentation (README, docs/, code comments)
- [ ] I have added/updated examples (if applicable)
- [ ] I have updated CHANGELOG.md

## Checklist

- [ ] My code follows the project's coding guidelines (see CONTRIBUTING.md)
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] My changes generate no new warnings
- [ ] I have checked my code and corrected any misspellings
- [ ] The PR title follows conventional commits format (e.g., `feat:`, `fix:`, `docs:`)

## Screenshots (if applicable)

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## Additional Notes

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