feat: scaffold elevator-front Vue 2 project

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Former-commit-id: 6fbe83de8e476b5b6de173cdaef67ddebfe3049f

frontend-source/projects/elevator-front/src/api/index.js

@@ -0,0 +1,17 @@
+import axios from 'axios';
+
+const api = axios.create({
+  baseURL: '/api',
+  timeout: 30000,
+});
+
+api.interceptors.request.use((config) => {
+  return config;
+});
+
+api.interceptors.response.use(
+  (response) => response.data,
+  (error) => Promise.reject(error)
+);
+
+export default api;