feat: add RegisterResult component, ESLint config, and vue.config.js for project setup

- Created a new RegisterResult.vue component for displaying registration success.
- Added ESLint configuration for unit tests in the tests directory.
- Implemented vue.config.js for webpack configuration, including theme color support and proxy settings for development.

frontend_vue/src/views/user/RegisterResult.vue

@@ -0,0 +1,26 @@
+<template>
+  <div class="register-result">
+    <a-result
+      status="success"
+      :title="$t('user.register-result.msg', { email: '-' })"
+    >
+      <template #extra>
+        <a-button type="primary" @click="$router.push({ path: '/' })">
+          {{ $t('user.register-result.back-home') || '返回首页' }}
+        </a-button>
+      </template>
+    </a-result>
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'RegisterResult'
+}
+</script>
+
+<style scoped>
+.register-result {
+  padding: 24px;
+}
+</style>