feat: scaffold Svelte app with shared types and scale calculation

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -0,0 +1,27 @@
+{
+  "name": "scrap-tracer",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview",
+    "check": "svelte-check --tsconfig ./tsconfig.json",
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "@techstark/opencv-js": "4.12.0-release.1"
+  },
+  "devDependencies": {
+    "@sveltejs/vite-plugin-svelte": "^7.3.1",
+    "@tsconfig/svelte": "^5.0.8",
+    "@types/node": "^22.20.5",
+    "jpeg-js": "^0.4.4",
+    "svelte": "^5.57.2",
+    "svelte-check": "^4.7.6",
+    "typescript": "^6.0.3",
+    "vite": "^8.3.4",
+    "vitest": "^5.0.4"
+  }
+}