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/firstlogin.blade.php

@@ -10,6 +10,7 @@
         <div class="alert alert-info">
             <p>{{ __('boilerplate::auth.firstlogin.intro') }}</p>
         </div>
+        @include('load.form.password_toggle')
         <div class="form-group {{ $errors->has('password') ? 'has-error' : '' }}">
             {{ Form::label('password', __('boilerplate::auth.fields.password')) }}
             {{ Form::input('password', 'password', Request::old('password'), ['class' => 'form-control', 'autofocus']) }}