show indication in vscode statusbar when there are pending reload request

[heejaechang]

currently, when new packages are installed or changed, we do automatic reload, but there is no indication that we have pending reload in the queue. show some indication to reduce user confusion.

[StellaHuang95]

We can put at the same place as the x of files to analyze?

[heejaechang]

ya, I think that is good place.