feat: rewrite to use app config and rework docs (#143)

Co-authored-by: Daniel Roe <daniel@roe.dev>
Co-authored-by: Sébastien Chopin <seb@nuxt.com>

docs/content/6.layout/1.card.md

@@ -0,0 +1,35 @@
+---
+github: true
+---
+
+## Usage
+
+::component-example
+#default
+:card-example{class="w-full"}
+
+#code
+```vue
+<template>
+  <UCard>
+    <template #header />
+
+    Body
+
+    <template #footer />
+  </UCard>
+</template>
+```
+::
+
+## Props
+
+:component-props
+
+## Slots
+
+:component-slots
+
+## Preset
+
+:component-preset

docs/content/6.layout/2.container.md

@@ -0,0 +1,25 @@
+---
+github: true
+---
+
+## Usage
+
+::component-example
+#default
+:container-example{class="w-full"}
+
+#code
+```vue
+<template>
+  <UContainer>Content</UContainer>
+</template>
+```
+::
+
+## Props
+
+:component-props
+
+## Preset
+
+:component-preset