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/app.vue

@@ -1,6 +1,7 @@
 <template>
-  <div>
-    <NuxtRouteAnnouncer />
-    <NuxtWelcome />
-  </div>
+  <UApp>
+    <NuxtLayout>
+      <NuxtPage />
+    </NuxtLayout>
+  </UApp>
 </template>