loregrep 0.5.0

Repository indexing library for AI coding assistants. Tree-sitter parsing, fast in-memory indexing, and tool APIs for LLM integration.
Documentation
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## What

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## Why

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Closes #

## Checklist

- [ ] `cargo fmt --all --check` passes
- [ ] `cargo clippy --all-targets --all-features -- -D warnings` passes
- [ ] `cargo test --all-features` passes
- [ ] Tests added/updated for new behavior
- [ ] Docs updated if the public API or CLI changed