docs(content): move shortcuts into composables/

docs/content/3.components/alert.md

@@ -0,0 +1,28 @@
+---
+description: Display an alert element to draw attention.
+links:
+  - label: GitHub
+    icon: i-simple-icons-github
+    to: https://github.com/nuxt/ui/blob/dev/src/runtime/components/Alert.vue
+---
+## Usage
+
+## Examples
+
+## API
+
+### Props
+
+:component-props
+
+### Slots
+
+:component-slots
+
+### Events
+
+:component-events
+
+## Theme
+
+:component-theme