new: display dynamic password rules checklist on registration and profile edit

Each rule (length, lowercase, uppercase, number, special character)
shows a live check/cross icon as the user types.  Also aligns
``handlePasswordChange`` server-side validation with the boilerplate
``Password`` rule (was only enforcing min 8 chars).

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

@@ -11,10 +11,12 @@
                         <label>Mot de passe *</label>
                         {{ Form::password('password', [
                             'class' => 'form-control',
+                            'id' => 'password',
                             'placeholder' => __('boilerplate::auth.fields.password'),
                             'required',
                         ]) }}
                         {!! $errors->registration->first('password', '<p class="text-danger"><strong>:message</strong></p>') !!}
+                        @include('Shop.auth.partials.password_rules', ['passwordInputId' => 'password'])
                     </div>
                 </div>
                 <div class="col-6">