switch from PyQt6 to PySide6

PySide6 uses LGPL instead of GPL, which is much nicer to work with.

main.py

@@ -2,17 +2,16 @@ import logging
 import signal
 import ctypes
 
-from PyQt6 import QtCore
-from PyQt6.QtWidgets import *
-from PyQt6.QtCore import *
-from PyQt6.QtGui import *
+from PySide6 import QtCore
+from PySide6.QtWidgets import QApplication
+from PySide6.QtCore import QTimer
+from PySide6.QtGui import QIcon
 import sys
 
 import constants
 from raven.pluginregistry import PluginRegistry
 from ravenui import RavenUI
 
-
 logging.basicConfig(level=logging.INFO)
 log = logging.getLogger("main")