Add translation for the page not found error

src/locales/en.json

@@ -9,6 +9,7 @@
         }
     },
     "error": {
-        "tryAgainToAnotherTime": "Please try again to another time."
+        "tryAgainToAnotherTime": "Please try again to another time.",
+        "pageNotFound": "The page you are looking for does not exist. Please check the URL or return to the search page."
     }
 }

src/views/NotFound.vue

@@ -14,10 +14,16 @@ See the License for the specific language governing permissions and
 limitations under the License.
 -->
 
+<script setup>
+import { useI18n } from 'vue-i18n';
+
+const { t } = useI18n();
+</script>
+
 <template>
     <div class="not-found">
        <span class="error-message">
-            The page you are looking for does not exist. Please check the URL or return to the search page.
+            {{ t('error.pageNotFound') }}
         </span>
         <RouterLink to="/" id="link">Back to Search</RouterLink>
     </div>