Core library for `funcvec`.
This crate contains Rust project discovery, rust-analyzer/LSP function
extraction, source normalization, embedding providers, duplicate scoring, and
report formatting. Most users should install the CLI crate instead:
```sh
cargo install funcvec
```
The core crate is published separately because the CLI crate depends on it.
When releasing, publish `funcvec-core` before `funcvec`.