Export raw Air arrays (tags, datas, extra) from the Zig compiler via a
RawAirCallback on Compilation, and memcmp them against C-produced arrays
instead of comparing formatted text output. This is more robust (catches
any byte-level divergence) and eliminates the need for the C-side text
formatter.
- Add RawAirCallback type and field to Compilation
- Rewrite src/verbose_air.zig: raw array export instead of text capture
- Update stage0 tests to use compareAir with expectEqualSlices
- Delete stage0/verbose_air.{c,h} (no longer needed)
- Remove verbose_air.c/h from build.zig file lists
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>