Epic 4 — Warsh implementation

[Hetchy]

Parent: #27 · Plan

Goal: Land Warsh by adding data and the minimal Warsh-specific rule code on top of the seam. First epic that introduces new behavior.

Tasks

• Add the Warsh corpus from the Epic 0 script decision, through the Epic 1a validator.
• Add Warsh data files, phonemes, rules as riwaya-scoped siblings.
• Implement the genuine Warsh rule deltas from 1b (e.g. imala, differing madd measures, orthography-driven differences) via the adapter/fork pattern chosen in the 3a ADR.
• Turn the Epic 2B Warsh expected-case suite green.

Acceptance

• All Warsh expected-cases pass; Hafs characterization net still byte-identical.
• Phonemizer(riwaya="warsh") (or equivalent) produces verified output for the research-covered cases.