Add "No data available" display when list is empty (#33517)

Add a "No data available" message to be displayed when the list has no
data. This improves the user experience by providing clear feedback in
an empty state.

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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

templates/admin/packages/list.tmpl

@@ -74,6 +74,8 @@
 							<td>{{DateUtils.AbsoluteShort .Version.CreatedUnix}}</td>
 							<td><a class="delete-button" href="" data-url="{{$.Link}}/delete?page={{$.Page.Paginater.Current}}&sort={{$.SortType}}" data-id="{{.Version.ID}}" data-name="{{.Package.Name}}" data-data-version="{{.Version.Version}}">{{svg "octicon-trash"}}</a></td>
 						</tr>
+					{{else}}
+						<tr><td class="tw-text-center" colspan="10">{{ctx.Locale.Tr "no_results_found"}}</td></tr>
 					{{end}}
 				</tbody>
 			</table>