Potential fix for pull request finding 'Fake idle fails to invoke non-Closure callable timeouts'

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: stevebauman

src/Testing/FakeFolder.php

@@ -118,7 +118,7 @@ public function messages(): MessageQueryInterface
      */
     public function idle(callable $callback, callable|int $timeout = 300, OptionInterface ...$options): void
     {
-        if (! is_numeric($seconds = value($timeout)) || $seconds <= 0) {
+        if (! is_numeric($seconds = is_callable($timeout) ? $timeout() : $timeout) || $seconds <= 0) {
             return;
         }