Catcli

* pyfzf (listing and finding) and fusepy (mount) dependencies are optional

* fix dependencies in `setup.py`

* fix `setup.py` for pypi

features
* add fzf support (see issue 26 and formats `fzf-native` and `fzf-csv`)
* add fuse support for virtual filesystem from catalog (see issue 30 and command `mount`)
* replace `tree` with `ls -r`
* refactor node implementation
* test with pylint
* test with shellcheck
* more tests
* linting (f-string, typing and more)
* support for python 3.9 and 3.10
* drop python 3.5 support


bug fixes

* fix recursive size bug

* add `-s --raw-size` to print sizes as bytes (see 24)

* properly handle quotes in csv output (22)
* update README