feat: add cloud save backend

package.json

@@ -24,6 +24,7 @@
     "axios": "^1.7.7",
     "bcryptjs": "^2.4.3",
     "cookie-es": "^1.2.2",
+    "crypto": "^1.0.1",
     "fast-fuzzy": "^1.12.0",
     "file-type-mime": "^0.4.3",
     "jdenticon": "^3.3.0",
@@ -48,6 +49,7 @@
     "@tailwindcss/forms": "^0.5.9",
     "@tailwindcss/typography": "^0.5.15",
     "@types/bcryptjs": "^2.4.6",
+    "@types/node": "^22.13.16",
     "@types/turndown": "^5.0.5",
     "@types/uuid": "^10.0.0",
     "autoprefixer": "^10.4.20",