Task: XTS Shell completion

### Goal

To greatly improve the usability of the app, it would be nice if tab completion could be implemented.
This would mean, after typing `xts` in the terminal, you could use tab to cycle through the alias you have added. Using `xts <alias name>` and pressing tab would cycle through the top level argument from the .xts file that has been aliased.

### Notes (Optional)

_No response_