Make verbose output optional

[kolibril13]

Currently, there is a log message displayed in the cell-output after the capture cell magic is called.
There could be a flag that gives control over this behavior.
Two options are possible:

1. Show message by default, and the --nonverbose flag hides the message.
2. Hide message by default, and the --verbose flag will show the message.

Personally, I am slightly in favor of the second option because it is more minimalistic, but I am open to arguments for using the 1. option.

These are the lines that produce the log messages:

jupyter_capture_output/jupyter_capture_output/co_cellmagic.py

Line 19 in d12349b

print(f"Note: The {path_pathlib.parent} directory was successfully created.")

jupyter_capture_output/jupyter_capture_output/co_cellmagic.py

Line 22 in d12349b

print(f"Output saved by creating file at {path_pathlib}.")

jupyter_capture_output/jupyter_capture_output/co_cellmagic.py

Line 26 in d12349b

print(f"Output saved by overwring previous file at {path_pathlib}.")