new: add password visibility toggle on all password fields

Reusable ``password_toggle.blade.php`` partial that wraps every
``input[type=password]`` with an eye icon button. Clicking it
toggles between hidden and visible text. Handles Bootstrap modals
via ``shown.bs.modal`` event. Applied on login, register, password
change (shop + admin), password reset, and first login pages.

resources/views/Shop/auth/partials/register.blade.php

@@ -68,6 +68,8 @@
 </div>
 </form>
 
+@include('load.form.password_toggle')
+
 @push('js')
     <script>
         $('#use_for_delivery').click(function() {