Add phone or username placeholder in login view and update Turkish translations

- Updated the login view to include a placeholder for phone or username input.
- Added a new Turkish translation for the phone or username placeholder to enhance user guidance.

app/Modules/BaseAuth/Resources/Lang/tk/base.php

@@ -30,4 +30,5 @@ return [
     'go_back' => 'Yza',
     'successfully_changed_phone' => 'Telefon belgiňiz üýtgedildi',
     'resend' => 'Täze tassyklaýyş belgi ugratmak',
+    'phone_or_username_placeholder' => 'meselem: 65999990 yada ulanyjy_ady',
 ];