Ability to print trees (directories)

[ssbarnea]

I am currently using another small library to print a simple three but it could prove useful if rich would also be able to do something like:

└── folder
    ├── foo
    ├── bar
    └── destroy

[willmcgugan]

Yes, I was thinking about porting something like https://docs.pyfilesystem.org/en/latest/guide.html#tree-printing to Rich. Post it as an issue with the "enhancement" label if you want to track it.

[ssbarnea]

For the moment I decided to re-use the YAML printing and avoid the need to render a real tree. See ansible/molecule#2920 -- it looks tree enough for me and one less dependency is always something to be appreciated.