Added vitepress docs

docs/.vitepress/config.js

@@ -0,0 +1,15 @@
+import { defineConfig } from 'vitepress'
+
+export default defineConfig({
+  title: 'Vue 3D Mockup',
+  description: '📱 A 3D phone mockup component to showcase your apps',
+  themeConfig: {
+    nav: [
+      { text: 'Guide', link: '/guide' },
+      { text: 'Github', link: 'https://github.com/anatolykopyl/vue-three-d-mockup' }
+    ],
+    footer: {
+      message: 'Released under the GPL-3.0 license.',
+    }
+  }
+})