feat: add input component

docs/components/input/examples/InputSizeExample.vue

@@ -0,0 +1,10 @@
+<template>
+  <div class="vp-raw flex flex-col align-center gap-2 flex-wrap">
+    <Input size="sm" placeholder="enter your first name" label="Small" />
+    <Input size="md" placeholder="enter your last name" label="Medium" />
+    <Input size="lg" placeholder="enter your second name" label="Large" />
+  </div>
+</template>
+<script lang="ts" setup>
+import { Input } from '../../../../src/index'
+</script>