feat(infra): add tools service with document scanner, image & PDF tools

Implement self-hosted document scanner and media processing tools as
an alternative to CamScanner/ilovepdf without third-party uploads.

Backend: Rust Axum gateway + worker pool with NATS JetStream queue
Frontend: Next.js 16 + shadcn/ui + Tailwind v4 + Framer Motion
Pipeline: Canny edge detection -> DLT homography warp -> Sauvola
binarization -> Hough deskew -> Tesseract OCR -> searchable PDF

Phase 1 (MVP) delivers:
- Document scanner with perspective correction and OCR
- Image compress/resize/convert tools
- PDF merge/split/compress tools
- Real-time WebSocket progress updates
- Rate limiting, auto-cleanup, Prometheus metrics
- Full CI/CD pipeline with Docker multi-stage build

Co-Authored-By: Kilo <kilo@kilo.ai>

apps/tools/frontend/package.json

@@ -0,0 +1,35 @@
+{
+  "name": "tools-frontend",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev --port 3002",
+    "build": "next build",
+    "start": "next start",
+    "lint": "biome check",
+    "format": "biome format --write"
+  },
+  "dependencies": {
+    "@shadcn/react": "^0.2.1",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
+    "framer-motion": "^12.42.2",
+    "lucide-react": "^1.26.0",
+    "next": "16.2.11",
+    "next-themes": "^0.4.6",
+    "react": "19.2.8",
+    "react-dom": "19.2.8",
+    "sonner": "^2.0.7",
+    "tailwind-merge": "^3.6.0",
+    "tw-animate-css": "^1.4.0"
+  },
+  "devDependencies": {
+    "@biomejs/biome": "2.5.5",
+    "@tailwindcss/postcss": "^4",
+    "@types/node": "^26",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "tailwindcss": "^4",
+    "typescript": "^5.9.3"
+  }
+}