style: separate logs from subprocesses

[km1chno]

Resolves #67

Changes

• create spawnSubprocess function in interactive extension that prints subprocess logs in a neat separated section
• some stylistic changes in normal logs, warnings and errors
• change furtherActions to not be printed in box, but in a section similar to subprocesses logs

Success demo

Note: I don't know why at the end of the recording, the "What next" section header and footer look like they are white and not cyan. Trust me, they are cyan, it's just the recording behaving weirdly:P

demo_success.mp4

Error demo

demo_error.mp4