Add Next.js + shadcn/ui scaffold with deps

- Next.js 15 App Router, TypeScript, Tailwind CSS
- shadcn/ui components: button, input, select, textarea, dialog, tabs, table, card, badge, label, separator, dropdown-menu, form, sheet, tooltip
- Runtime deps: @tanstack/react-table, zod, react-hook-form, @hookform/resolvers, lucide-react, date-fns

web/eslint.config.mjs

@@ -0,0 +1,18 @@
+import { defineConfig, globalIgnores } from "eslint/config";
+import nextVitals from "eslint-config-next/core-web-vitals";
+import nextTs from "eslint-config-next/typescript";
+
+const eslintConfig = defineConfig([
+  ...nextVitals,
+  ...nextTs,
+  // Override default ignores of eslint-config-next.
+  globalIgnores([
+    // Default ignores of eslint-config-next:
+    ".next/**",
+    "out/**",
+    "build/**",
+    "next-env.d.ts",
+  ]),
+]);
+
+export default eslintConfig;