Add the lossless resilient parser, syntax-anchored HIR, and canonical width algebra with corpus, fuzz, property, and cliff coverage.

Introduce package-aware Tier-A header and supported-body checking, explicit body deferrals, and wire parse/check through the CLI's structured diagnostics. Reconcile workspace metadata and documentation with the completed slice-0 checkpoint.

Amp-Thread-ID: https://ampcode.com/threads/T-019f876e-f033-7148-bb2d-08e0ed053ce3
Co-authored-by: Amp <amp@ampcode.com>