Refactor UI imports and clean up unused code

- Removed unnecessary imports from various UI files to streamline the codebase.
- Deleted the unused documentation viewer implementation in `documentationview.py`.
- Cleaned up imports in `files.py` by removing `LOG_DIR` as it was not used.
- Removed the temporary script `temp.py` as it was no longer needed.

src/utils/__init__.py

@@ -1,3 +1,10 @@
+__all__ = [
+    "Icon",
+    "SemesterDocument",
+    "app_sort",
+    "name_sort",
+]
+
 from .icon import Icon
-from .sortgenerator import app_sort, name_sort
 from .richtext import SemesterDocument
+from .sortgenerator import app_sort, name_sort