formatting using black with iosort

also config change for it
feat: do not show notification for no new entries
bugfix: wrong url in readme
bugfix: remove nonexisting import and fix gui_scripts path
cleanup: move some qt code
add feed image for notification
update gitignore
add icon to notify-send command
bugfix: delete feeds from gui that dont exist anymore
move startup code to __main__
bugfix: negate is_read value to unread
revert this if changed is_read to unread on server
refresh feeeds on start if connection is available
remove: tracking last updated of feeds
cleanup: remove empty method call
remove seemingly unneccesary paintEvent method
add category to gui
add category field to logic
bug: old variable method name
move ui code into logic classess