Refactor logging setup across multiple modules to use loguru with consistent configuration

- Updated logging initialization in MessageCalendar, admin_edit_prof, elsa_main, graph, iconLine, searchPage, and richtext modules to use loguru.
- Changed log rotation and retention settings for log files to improve log management.
- Replaced logger.debug/info calls with log.debug/info for consistency.
- Fixed a typo in the searchPage UI and updated related references in the UI files.
- Removed unused imports and cleaned up code for better readability.

src/ui/semesterapparat_ui.ui

@@ -505,7 +505,7 @@
                  <enum>Qt::NoFocus</enum>
                 </property>
                 <property name="title">
-                 <string>Apparatsdetails</string>
+                 <string>SemesterApparatsdetails</string>
                 </property>
                 <property name="alignment">
                  <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>