Unflatten Johnny Decimal

This is a small script to modify my file structure implementation of the johnny decimal that I will probably only ever use once.

It goes form this:

.
├► 21.01-dotfiles
├► 22.01-proj_1
├► 22.02-proj_1
├► 22.04-proj_1
└► 45.01-someotherthing

To this:

.
├► 21
│   └► 01-dotfiles
│
├► 22
│   ├► 01-proj_1
│   ├► 02-proj_1
│   └► 03-proj_1
│
└► 45
    └► 01-someotherthing