Add Next.js 15 app skeleton with Tailwind v4 and shadcn/ui

Next.js 15 + React 19, Tailwind v4, shadcn/ui (button, card, input,
dialog), postcss config, standalone output. ESLint extended with
next/core-web-vitals via eslint-config-next flat export. node-linker=hoisted
in .npmrc to allow standalone builds on Windows (symlink restriction).
next-env.d.ts added to .gitignore.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -8,6 +8,9 @@
     "node": ">=22"
   },
   "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
     "lint": "eslint .",
     "lint:fix": "eslint . --fix",
     "format": "prettier --write .",
@@ -15,12 +18,30 @@
     "typecheck": "tsc --noEmit"
   },
   "devDependencies": {
+    "@eslint/eslintrc": "^3.3.5",
     "@eslint/js": "^10.0.1",
+    "@tailwindcss/postcss": "^4.2.4",
     "@types/node": "^22.9.0",
+    "@types/react": "^19.2.14",
+    "@types/react-dom": "^19.2.3",
     "eslint": "^9.15.0",
+    "eslint-config-next": "^16.2.4",
     "globals": "^15.12.0",
     "prettier": "^3.3.3",
+    "tailwindcss": "^4.2.4",
     "typescript": "^5.6.3",
     "typescript-eslint": "^8.15.0"
+  },
+  "dependencies": {
+    "@base-ui/react": "^1.4.1",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
+    "lucide-react": "^1.14.0",
+    "next": "^15.5.15",
+    "react": "^19.2.5",
+    "react-dom": "^19.2.5",
+    "shadcn": "^4.7.0",
+    "tailwind-merge": "^3.5.0",
+    "tw-animate-css": "^1.4.0"
   }
 }