feature request: allow to execute copied jq in the same json

[alarbada]

This would come very handy when exploring large jsons. I'm not sure if this has been already requested.

Basically, with a combination of keys, jless would copy the current jq path and exec it into the current json. You would be able then to explore the json as you wish. Pressing 'q' would toggle off the current applied jq path.