chore: restructured project, updated readme

src/ui/dialogs/progress.py

@@ -5,9 +5,9 @@ from PySide6 import QtCore
 from PySide6.QtWidgets import QDialog, QPushButton, QVBoxLayout
 from qtqdm import Qtqdm, QtqdmProgressBar
 
-from src.logic import BookData
-from src.logic.lehmannsapi import LehmannsClient
-from src.logic.SRU import SWB
+from src.core.models import BookData
+from src.services.lehmanns import LehmannsClient
+from src.services.sru import SWB
 
 
 class CheckThread(QtCore.QThread):