Add dd_when Helper to Conditionally Trigger dd()

[afiqiqmal]

Propose helper function, dd_when, allowing conditional debugging with dd(). This function provides a simple way to invoke dd() based on a boolean condition.

Example Usage:

dd_when($user->isAdmin(), $user, 'Only admins can see this debug info');

Sample Use case:

Before

foreach($users as $user) {
      if ($user->dontHaveOrder()) {
            dd($user->id);
      }
     ....
}

After

foreach($users as $user) {
      dd_when($user->dontHaveOrder(), $user->id);
     ....
}