Add Apple Silicon modernization implementation plan
12 tasks covering Phase 1 (script rewrite, --no-binary removal,
flavor deletion, README, local validation on 3.13.13 and 3.14.5)
and Phase 2 (patch bumps, 3.14 enablement, 3.9/3.10 final-release
notes, pip pin sweep, Dependabot, manual release dispatches).
Phase 3 (CI consolidation, runner migration, action bumps) is
out of scope; Task 7 includes a stopgap so existing workflows keep
calling the refactored script.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
