fix: 修复 bangumi search API 中的流式接口，webui 对应接口定义方法改造

- StreamingResponse 换成 EventSourceResponse，即 Server Send Event Source 方式发送数据
- webui 中 search 接口改成 rxjs Observable 方式，
  这次来不及改到 vue 里，但是写了接口 usage example；
- 顺手补了一些 vscode 通用的开发配置，
  补了之前配置文件解析漏了一个可用环境变量的 host 字段

webui/package.json

@@ -24,6 +24,7 @@
     "lodash": "^4.17.21",
     "naive-ui": "^2.34.4",
     "pinia": "^2.1.3",
+    "rxjs": "^7.8.1",
     "vue": "^3.3.4",
     "vue-i18n": "^9.2.2",
     "vue-inline-svg": "^3.1.2",
@@ -42,9 +43,11 @@
     "@storybook/vue3-vite": "^7.0.12",
     "@types/lodash": "^4.14.194",
     "@types/node": "^18.16.14",
+    "@unocss/preset-attributify": "^0.55.3",
     "@unocss/preset-rem-to-px": "^0.51.13",
     "@unocss/reset": "^0.51.13",
     "@vitejs/plugin-vue": "^4.2.0",
+    "@vue/runtime-dom": "^3.3.4",
     "eslint": "^8.41.0",
     "eslint-config-prettier": "^8.8.0",
     "eslint-plugin-storybook": "^0.6.12",