Add CLI for adding new data to existing stage

[thorstenwagner]

I wanted to add more data to a stage, but found that there is no easy solution.

So I just opened the file in vim and added the new files which seems to work nicely.

However, I could be more convenient by a command. Especially if you want to add many files to existing stage file.

Best
Thorsten

[kevin-hanselman]

So I just opened the file in vim and added the new files which seems to work nicely.

Hi, @thorstenwagner! This is the intended way to add files to a stage or otherwise modify it. Nonetheless, I'll keep this issue open for a future feature.