docs: improve

docs/app/content/2.components/collapsible.md

@@ -0,0 +1,17 @@
+---
+description: A container lets you center and constrain the width of your content.
+links:
+  - label: GitHub
+    icon: i-simple-icons-github
+    to: https://github.com/nuxt/ui/blob/dev/src/runtime/components/layout/Container.vue
+---
+
+## Usage
+
+## Props
+
+:component-props
+
+## Config
+
+:component-preset