No build progress when running microbundle command

currently when running microbundle command, there is no indication as to what is happening and the progress of the process. The console just stays empty for 2-5 minutes and spits out the bundled output with sizes.

I have been through the configurations/options but found no option which enables showing build progress.

Any plans for adding this feature?

該 issue 未指明任何檔案、測試或進入點。先定位 microbundle 命令的實作及其現有的主控台輸出，然後確認在產生打包輸出之前，2–5 分鐘的 build 過程中會顯示可見的進度指示。

由索引模型根據 Issue 內容生成。