Add cards to registration apps

apps/registration/templates/registration/email_validation_complete.html

@@ -5,14 +5,29 @@ SPDX-License-Identifier: GPL-3.0-or-later
 {% load i18n %}
 
 {% block content %}
+<div class="card bg-light">
+    <h3 class="card-header text-center">
+        {{ title }}
+    </h3>
+    <div class="card-body">
         {% if validlink %}
+        <p>
             {% trans "Your email have successfully been validated." %}
+        </p>
         {% if user_object.profile.registration_valid %}
+        <p>
             {% blocktrans %}You can now <a href="{{ login_url }}">log in</a>.{% endblocktrans %}
+        </p>
         {% else %}
+        <p>
             {% trans "You must pay now your membership in the Kfet to complete your registration." %}
+        </p>
         {% endif %}
         {% else %}
+        <p>
             {% trans "The link was invalid. The token may have expired. Please send us an email to activate your account." %}
+        </p>
         {% endif %}
+     </div>
+</div>
 {% endblock %}

apps/registration/templates/registration/email_validation_email_sent.html

@@ -5,13 +5,17 @@ SPDX-License-Identifier: GPL-3.0-or-later
 {% load i18n %}
 
 {% block content %}
-<h2>{% trans "Account activation" %}</h2>
-
+<div class="card bg-light">
+    <h3 class="card-header text-center">
+        {% trans "Account activation" %}
+    </h3>
+    <div class="card-body">
         <p>
             {% trans "An email has been sent. Please click on the link to activate your account." %}
         </p>
-
         <p>
             {% trans "You must also go to the Kfet to pay your membership. The WEI registration includes the BDE membership." %}
         </p>
+    </div>
+</div>
 {% endblock %}