Feature request: choose which file to be opened

[joaodarocha]

It would be nice to open a specific file.
We would pass the file path after the flag "--file" or "-f".

Usage suggestions:
office-toolbox sideload -m my/add-in/manifest.xml -a word --file /path/to/file.docx
OR
office-toolbox sideload -m my/add-in/manifest.xml -a word -f /path/to/file.docx
-f /path/to/file.docx

And it would sideload the add-in in the specified file.