chore(01-01): scaffold monorepo, Docker Compose stack, and Vitest harness

- pnpm workspace with apps/api (Hono/Drizzle) and apps/pwa (Vite/React 19)
- Pinned versions per RESEARCH: hono@4.12.23, drizzle-orm@0.45.2, mysql2@3.22.4, tsdav@2.2.2, ical.js@2.2.1, zod@^3.25.0, node-cron@^4.2.1
- docker-compose.yml with mariadb:11 healthcheck, api depends_on service_healthy, redis stub
- docker-compose.dev.yml overrides for local dev (bind mounts, exposed ports)
- .env.example lists all env vars (DB_*, OIDC_*, APP_PASSWORD_ENCRYPTION_KEY)
- .gitignore excludes .env (never commit secrets)
- apps/api/vitest.config.ts with environment: node
- Wave 0 test stubs: health, auth/user, broker/crypto, broker/sync, broker/poller

package.json

@@ -0,0 +1,13 @@
+{
+  "name": "familysync",
+  "private": true,
+  "packageManager": "pnpm@11.5.1",
+  "scripts": {
+    "dev:api": "pnpm --filter @familysync/api dev",
+    "dev:pwa": "pnpm --filter @familysync/pwa dev",
+    "build": "pnpm --filter @familysync/api build && pnpm --filter @familysync/pwa build",
+    "test": "pnpm --filter @familysync/api test",
+    "lint": "pnpm -r lint",
+    "typecheck": "pnpm -r typecheck"
+  }
+}