executable suggestions for pro users

[ktalamad]

Feature description

For many CLAI skills, pro users would like a mode where a skill returns its output to a new line in the terminal, but does not send a return. This will allow the user to edit the command prior to executing it, and enables another assistant-like interaction pattern.

For example, the nlc2cmd skill, with this feature turned on, would have the option of populating the suggestion (Try >> suggestion) into the terminal window / command prompt following the return from CLAI, i.e.

/> suggestion

This would allow the user to edit the contents of the suggestion before deciding to execute or not. This is an enhancement of the current y/n/e mode that we provide.

Acceptance criteria

1. CLAI is able to auto-populate a returned suggestion on to the prompt; and
2. There is a mode that can be enabled for getting the above behavior.

This suggestion from David MacMillan at the ICML 2020 IBM Booth.