funera 0.3.0

Flexible and security-oriented LLM agent framework for Rust — ReAct loop, tools, skills, middleware, security
Documentation
## Summary

<!-- What does this change do and why? -->

## Type of change

- [ ] Bug fix
- [ ] New feature
- [ ] Breaking change
- [ ] Documentation update

## Checklist

- [ ] `cargo fmt --check --all` passes
- [ ] `cargo clippy --all-features -- -D warnings` passes
- [ ] `cargo test --workspace --all-features` passes
- [ ] `cargo test --doc --all-features --workspace` passes
- [ ] I have added tests for the new behavior
- [ ] I have updated the documentation / README / CHANGELOG where relevant

## Related issues

<!-- e.g. Closes #123 -->