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

vitest.config.ts

@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: { include: ['{apps,packages}/*/{src,test}/**/*.test.{ts,tsx}'], passWithNoTests: true },
+});