feat: add signup form

kursy/templates/header.html

@@ -0,0 +1,15 @@
+{% load i18n %}
+<header class="bg-blue-900 text-white shadow-md">
+  <div class="container mx-auto flex items-center justify-between py-4 px-6">
+    <a class="text-xl font-bold" href="/">Kursy</a>
+    <nav class="space-x-4">
+      <a href="#" class="hover:underline">{% trans "Home" %}</a>
+        {% if user.is_authenticated %}
+         <a href="{% url 'account_logout' %}" class="hover:underline">{% trans "Logout" %}</a>
+        {% else %}
+          <a href="{% url 'account_login' %}" class="hover:underline">{% trans "Login" %}</a>
+          <a href="{% url 'account_signup' %}" class="hover:underline">{% trans "Sign Up" %}</a>
+        {% endif %}
+    </nav>
+  </div>
+</header>