accordeon css add

source/css/style.pcss

@@ -22,6 +22,7 @@
 @import "./atoms/alert.pcss";
 @import "./atoms/avatar.pcss";
 @import "./atoms/card.pcss";
+@import "./atoms/collapsibles.pcss";
 @import "./atoms/contact-line.pcss";
 @import "./atoms/container.pcss";
 @import "./atoms/figure.pcss";