chore: pnpm workspace — landing, api, shared

apps/landing: Next.js 16 (App Router, standalone), Tailwind 4, ESLint
с запретом импорта из api. apps/api: Hono + better-sqlite3, сборка tsup,
/api/health. packages/shared: исходники TS без сборки. Vitest projects.

tsconfig.base.json

@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "ES2023",
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "strict": true,
+    "noUncheckedIndexedAccess": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "isolatedModules": true,
+    "resolveJsonModule": true,
+    "noEmit": true
+  }
+}