feat: initialize project with event order form

This commit establishes the initial structure of the Nuxt application, centered around a new event order form.

Key changes include:
- Setting up the main app layout with a header, footer, and color mode support using @nuxt/ui.
- Creating a multi-part event order form on the index page.
- Introducing a `useEventOrder` composable to manage form state and validation with Zod.
- Adding modular form components under `app/components/eventOrder`.
- Including project configuration files for pnpm, VSCode, and global CSS.

app/pages/index.vue

@@ -0,0 +1,29 @@
+<template>
+  <div>
+    <UPageHero
+      title="客制化高定系统"
+      description="以自研技术为核心，专注打造高度定制化的交互展示系统。首创动态竞标与赞助商展示方案，全面支持宴会、活动与颁奖典礼等多场景应用，让每一场盛会更具视觉冲击与品牌价值。"
+    />
+
+    <UContainer>
+      <UForm :schema="orderSchema" :state="orderState" class="space-y-4">
+        <!-- 联系人信息 -->
+        <EventOrderMetaDetails />
+        <!-- 竞标大屏 -->
+        <EventOrderProductBidding />
+        <!-- 背景设计 -->
+        <EventOrderProductBackgroundDesign />
+        <!-- 致辞 / 流程 PPT 设计 -->
+        <EventOrderProductFlowDesign />
+        <!-- 赞助商名册 -->
+        <EventOrderProductSponsor />
+      </UForm>
+    </UContainer>
+  </div>
+</template>
+
+<script lang="ts" setup>
+const { orderSchema, orderState } = useEventOrder();
+</script>
+
+<style></style>