Refactor and enhance type hints across multiple modules

- Updated the `from_tuple` method in `Prof` class to specify return type.
- Added type hints for various methods in `LehmannsClient`, `OpenAI`, `WebRequest`, and `ZoteroController` classes to improve code clarity and type safety.
- Modified `pdf_to_csv` function to return a string instead of a DataFrame.
- Enhanced error handling and type hints in `wordparser` and `xmlparser` modules.
- Removed unused UI file `Ui_medianadder.ts`.
- Improved the layout and structure of the `semesterapparat_ui` to enhance user experience.
- Updated file picker to support `.doc` files in addition to `.docx`.
- Added unique item handling in `Ui` class to prevent duplicates in apparat list.
- General code cleanup and consistency improvements across various files.

src/ui/dialogs/docuprint.py

@@ -110,10 +110,10 @@ class DocumentPrintDialog(QtWidgets.QDialog, Ui_Dialog):
     def on_pushButton_clicked(self):
         apparats: list[tuple[int, str]] = []
         apps = self.db.getAllAparats(0)
-        apps = natsorted(apps, key=lambda x: x[4], reverse=True)
+        apps = natsorted(apps, key=lambda x: x.appnr, reverse=True)
         for app in apps:
-            prof = self.db.getProfById(app[2])
-            data = (app[4], f"{prof.lastname} ({app[1]})")
+            prof = self.db.getProfById(app.prof_id)
+            data = (app.appnr, f"{prof.lastname} ({app.name})")
             apparats.append(data)
         SemesterDocument(
             semester=self.semester.value,