Option to disable autocomplete

[altaurog]

I’d like to see a way to disable autocomplete altogether, not just smart autocomplete (as discussed in #158 and #162). I found that setting the PromptSession parameter complete_while_typing=False does the trick. Any chance a PR adding a cli (or config) option for this would be accepted?

[ellbosch]

Thanks @altaurog, we would gladly accept a PR for this!