feat: add constructs library mention

Author: FilipPyrek

docs/astro.config.mjs

@@ -111,6 +111,17 @@ export default defineConfig({
 						directory: 'getting-started'
 					}
 				},
+				{
+					label: 'Constructs Library',
+					link: 'https://buttonize.io/library/',
+					attrs: {
+						target: '_blank'
+					},
+					badge: {
+						text: 'NEW',
+						variant: 'note'
+					}
+				},
 				{
 					label: 'Core concepts',
 					autogenerate: {