chore: Next.js-Grundgerüst mit AdminLTE-CSS und Bootstrap Icons (#001)

Next.js 16 (App Router, TypeScript strict), admin-lte 4.9.1 (nur CSS),
bootstrap 5.3.8, bootstrap-icons, zod. Version 0.1.0-dev.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

package.json

@@ -0,0 +1,39 @@
+{
+  "name": "proxledger",
+  "version": "0.1.0-dev",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "eslint",
+    "typecheck": "tsc --noEmit",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "format": "prettier --write ."
+  },
+  "dependencies": {
+    "admin-lte": "^4.9.1",
+    "bootstrap": "^5.3.8",
+    "bootstrap-icons": "^1.13.1",
+    "next": "16.3.5",
+    "react": "19.2.8",
+    "react-dom": "19.2.8",
+    "zod": "^4.6.5"
+  },
+  "devDependencies": {
+    "@types/node": "^24.13.5",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "eslint": "^9",
+    "eslint-config-next": "16.3.5",
+    "eslint-config-prettier": "^10.1.8",
+    "prettier": "^3.9.7",
+    "typescript": "^5",
+    "vitest": "^5.0.1"
+  },
+  "description": "Proxmox Subscription Dashboard",
+  "engines": {
+    "node": ">=24"
+  }
+}