docs(README): Translate to Portuguese and enhance with project details

- Added NutriScan logo and updated badge versions for accuracy
- Translated entire README from English to Portuguese for localization
- Introduced new sections: mission, differentials, statistics, and visual demonstration
- Restructured table of contents and expanded project description for better user engagement and clarity

public/manifest.json

@@ -13,6 +13,12 @@
       "src": "/favicon.ico",
       "sizes": "any",
       "type": "image/x-icon"
+    },
+    {
+      "src": "/icon.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any maskable"
     }
   ]
 }