feat(scanApps): 增加扫描 core 工程的功能

- 在 start 函数中添加了对 VUE_APP_CORE 环境变量的检查
- 如果 VUE_APP_CORE 存在，将 'packages/core' 添加到扫描范围中

bin/scanApps.js

@@ -21,10 +21,11 @@ const getAppInfo = (file, apps) => {
 
 const start = () => {
   chalkTag.info("开始扫描库工程...")
-  const {VUE_APP_SCOPE} = process.env
+  const {VUE_APP_SCOPE, VUE_APP_CORE} = process.env
   const list = []
   let scanScope = ['packages', 'project']
   if (VUE_APP_SCOPE) scanScope = [`project/${VUE_APP_SCOPE}`]
+  if (VUE_APP_CORE) scanScope.push('packages/core')
   Promise.all(scanScope.map(e => findApp(e, app => getAppInfo(app, list)))).then(() => {
     fsExtra.outputFile('examples/router/apps.js', `export default [${list.map(e => {
       const {name, label, path, esm} = e