Examples can't import from a bin-only crate, so add a thin lib.rs that
re-exports the existing modules. Used by the new examples that helped
diagnose the freeze fixed in the previous commit.
- examples/time_open: times parse / purge / cache / first-wires phases
- examples/inspect_insert: lists Insert blocks with sub-entity counts
- examples/find_raster: dumps RasterImage path + dimensions
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
