Split docs into multiple pages

docs/guide/index.md

@@ -0,0 +1,31 @@
+# Introduction
+
+## Installation
+
+```bash
+npm install vue-three-d-mockup
+```
+
+## Simple usage example
+
+<script setup>
+import Mockup from '../../src/Mockup.vue'
+import screenImage from '../assets/screen.png';
+</script>
+
+<Mockup
+  style="width: 100%; height: 400px;"
+  :screen="screenImage"
+/>
+
+`screen.png` is a static asset in the public folder.
+
+```vue
+<template>
+  <Mockup screen="screen.png" />
+</template>
+
+<script setup>
+import Mockup from 'vue-three-d-mockup';
+</script>
+```