Feature summary (what you would like to be able to do and where): I wish mwcli provides autocompleting commands by pressing the tab key.
Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution): There are a few commands in mwcli, but I mainly use limited commands, as mw dev mediawiki create or mw dev mysql destroy.
Benefits (why should this be implemented?): If autocompletion is provided, users and I could reduce the number of typing.
