feat: publicize doc implemetation

one/docs/demo/toast/default.vue

@@ -0,0 +1,54 @@
+<template>
+<article>
+  <section>
+    <veui-toast
+      type="info"
+      open
+      message="Press any key to continue..."
+    />
+  </section>
+  <section>
+    <veui-toast
+      type="success"
+      open
+      message="Your profile has been updated."
+    />
+  </section>
+  <section>
+    <veui-toast
+      type="warning"
+      open
+    >
+      v1 is deprecated. Use v2 instead.
+    </veui-toast>
+  </section>
+  <section>
+    <veui-toast
+      type="error"
+      open
+      message="Uncaught SyntaxError: Unexpected token +"
+    />
+  </section>
+</article>
+</template>
+
+<script>
+import { Toast } from 'veui'
+
+export default {
+  components: {
+    'veui-toast': Toast
+  }
+}
+</script>
+
+<style lang="less" scoped docs>
+.veui-toast {
+  position: relative;
+}
+
+section {
+  margin-bottom: 20px;
+  text-align: center;
+}
+</style>