Feat/certificate (#68)

* feat: implement certificate encoding and decoding functionality with AES encryption

* feat: blank cert

* Refactor code structure for improved readability and maintainability

package.json

@@ -49,11 +49,13 @@
     "dayjs": "^1.11.13",
     "framer-motion": "^12.9.2",
     "graphql": "^16.11.0",
+    "html2canvas": "^1.4.1",
     "js-cookie": "^3.0.5",
     "next": "~16.0.3",
     "next-themes": "^0.4.6",
     "openapi-fetch": "^0.15.0",
     "openapi-react-query": "^0.5.0",
+    "qrcode": "^1.5.4",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
     "react-hook-form": "^7.56.4",
@@ -96,6 +98,7 @@
     "@testing-library/user-event": "^14.6.1",
     "@types/js-cookie": "^3.0.6",
     "@types/node": "^22.12.0",
+    "@types/qrcode": "^1.5.6",
     "@types/react": "^19.1.2",
     "@types/react-dom": "^19.1.2",
     "@vitejs/plugin-react": "^4.2.0",