add autocomplete to interactive wizard prompt

[locksten]

Description

Running rnv now displays an autocomplete prompt where tasks starting with the same word are grouped.
If a group is selected, it prompts for a platform (if that can reduce the number of options).
If multiple options remain, it displays an autocomplete prompt where the ownerID is displayed for tasks with ambiguous names.

TODO

• Avoid hack (link) when filtering out unsupported engines without filtering out integrations.
• If rnv plugin is run, the first step is skipped. If rnv start is run, rnv prompts for the platform through a different code path. Should probably be unified.

rnv_wizard_autocomplete.mp4