feat: Add demo account creation functionality

- Introduce a new DemoAccountCreator component for generating test accounts with auto-generated credentials.
- Implement useDemoAccountGenerator composable to handle credential generation and state management.
- Update routing to replace the existing login page with the new LoginDemo page for demo account access.
- Add unique-names-generator package to facilitate username generation.

package-lock.json

@@ -29,6 +29,7 @@
         "tailwind-merge": "^2.6.0",
         "tailwind-variants": "^0.3.1",
         "tailwindcss-animate": "^1.0.7",
+        "unique-names-generator": "^4.7.1",
         "vue": "^3.5.13",
         "vue-i18n": "^9.14.2",
         "vue-router": "^4.5.0",
@@ -13819,6 +13820,15 @@
         "node": "^12.13.0 || ^14.15.0 || >=16.0.0"
       }
     },
+    "node_modules/unique-names-generator": {
+      "version": "4.7.1",
+      "resolved": "https://registry.npmjs.org/unique-names-generator/-/unique-names-generator-4.7.1.tgz",
+      "integrity": "sha512-lMx9dX+KRmG8sq6gulYYpKWZc9RlGsgBR6aoO8Qsm3qvkSJ+3rAymr+TnV8EDMrIrwuFJ4kruzMWM/OpYzPoow==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/unique-slug": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/unique-slug/-/unique-slug-3.0.0.tgz",