feat: implement export functionality for projects and scenarios with CSV and Excel support

templates/partials/alerts.html

@@ -0,0 +1,10 @@
+{% macro toast(id, hidden=True, level="info", message="") %}
+<div id="{{ id }}" class="toast toast--{{ level }}{% if hidden %} hidden{% endif %}" role="alert">
+  <span class="toast__icon" aria-hidden="true"></span>
+  <p class="toast__message">{{ message }}</p>
+  <button type="button" class="toast__close" data-toast-close>
+    <span aria-hidden="true">×</span>
+    <span class="sr-only">Dismiss</span>
+  </button>
+</div>
+{% endmacro %}