Add teachers page

src/pages/index.vue

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+<template>
+  <h1 class="text-12 text-center c-coolgray-700">
+    属于19预科2班的故事还未完结
+  </h1>
+</template>

src/pages/teachers/index.vue

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+<script setup lang="ts">
+
+</script>
+
+<template>
+  <h1 class="m-auto">
+    teachers
+  </h1>
+</template>
+
+<style scoped>
+
+</style>