React Native CI/CD

Instructions

Automate three pipelines: PR checks (lint, type, unit, E2E smoke), internal builds (per-commit on main), and release (tagged, signed, submitted).

1. PR Checks (GitHub Actions)

# .github/workflows/pr.yml
name: pr
on:
  pull_request:
    branches: [main]

concurrency:
  group: pr-${{ github.ref }}
  cancel-in-progress: true