Draft: Create a formatter module for the shell with tableview and treeview
This MR is related to !3116
It provides a helper to format treelib tree in a table.
It is also intended to clean the shell
package in order to move formatters there.
There is ugly things cause i don't want to reimplement stuffs already fixed in the treelib master. But it does the job. I can rebase it without the greenlet monitoring patch cause for now it is not related.
Edited by Valentin Valls