generate index.html recursively in dir
indx.py --dir . --html
indx.py --dir . --show --html
indx.py --dir subdir --html
indx.py --dir [DIR] ( one required, both can be used: [--show] AND/OR [--html] )
--html ; generate index.html for every directory in DIR. files and directories are listed in the index with filenames (truncated if over 16 chars)
--show ; output a directory tree of DIR similar to the tree utility
dark/light theme is set to --prefers-color-scheme. edit the css property in the script to your liking. layout can also be changed. go crazy.

