WIP: initial setup with vite and vitepress, example with button

docs/guide/button/ButtonExample.vue

@@ -0,0 +1,8 @@
+<template>
+  <Button variant="default">
+    Кнопка
+  </Button>
+</template>
+<script setup>
+import { Button } from "../../../src/index";
+</script>

docs/guide/button/button.md

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+<script setup>
+import ButtonExample from './ButtonExample.vue'
+</script>
+
+# Button
+
+<ButtonExample />