workspace: pnpm monorepo with api, web, shared

TypeScript 7 strict, ESLint + Prettier, vitest, AGPL-3.0 license.
Decision 0001 records the latest-majors choice and the TS 6 alias.

Task: M0-T1

apps/api/src/index.ts

@@ -0,0 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+import { APP_NAME } from '@selfphoneng/shared';
+
+console.log(`${APP_NAME} api`);