feat(admin): hint text for * search in user page (#2922)

fluxer_admin/src/templates/pages/users_list.rs

@@ -114,7 +114,10 @@ pub fn users_list_page(
     let content = html! {
         div class="space-y-6" {
             (page_header("Users", None))
-            div class="rounded-lg bg-white transition-all border border-neutral-200 p-4" {
+            div class="rounded-lg bg-white transition-all border border-neutral-200 p-3" {
+								p class="mb-1 text-xs text-neutral-500" {
+                    "For example, type " span class="font-mono" { "*" } " in to search for all users."
+                }
                 (search_form(base, params))
             }
             (results_markup)