Port step 6: detect real footage with local MediaPipe

frontend/package-lock.json

@@ -8,6 +8,7 @@
       "name": "arthur-frontend",
       "version": "0.0.1",
       "dependencies": {
+        "@mediapipe/tasks-vision": "1.0.1",
         "react": "^18.3.1",
         "react-dom": "^18.3.1"
       },
@@ -15,6 +16,12 @@
         "shadow-cljs": "^2.28.21"
       }
     },
+    "node_modules/@mediapipe/tasks-vision": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@mediapipe/tasks-vision/-/tasks-vision-1.0.1.tgz",
+      "integrity": "sha512-rvRE2FmAZ6ZxKSw7wq+e+jQDpN3t1B/tD2mJz9SmAzb1msoDkd4dMoE4wAh8Z30Um0PQwLiHr9QtomhmXk3aUQ==",
+      "license": "Apache-2.0"
+    },
     "node_modules/asn1.js": {
       "version": "4.10.1",
       "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",