- Add PolicyLengthConfig struct with max_col, max_file_bytes, and
max_lines fields, replacing hardcoded constants in the lexer.
- Add Engine::set_policy_length_config and clear_policy_length_config
to allow callers to override the default limits.
- Add Source::from_contents_with_limits and from_file_with_limits for
direct Source construction with custom limits; existing from_contents
and from_file signatures are preserved using defaults.
- Add tests for default rejection, custom limits, and engine plumbing.
- Add bindings for C, C++, Python, WASM/JS, Java, Ruby, C#, Go
