feat(redux): Rename all Redux slices and store keys to match file names for clarity

- Renamed all slice names (createSlice `name` attribute) to match their file names (e.g. loopChartSlice, authSlice, kueDataSlice etc.)
- Updated `store.ts` to register each reducer with consistent key names (e.g. state.loopChartSlice instead of state.loopChart)
- Adjusted all `useSelector` and Redux state accesses across the codebase
- Improves maintainability, searchability and consistency across files and Redux DevTools

components/main/uebersicht/Baugruppentraeger.tsx

@@ -18,7 +18,7 @@ const Baugruppentraeger: React.FC = () => {
     kueAlarm1,
     kueAlarm2,
     kueGroundFault,
-  } = useSelector((state: RootState) => state.kueData);
+  } = useSelector((state: RootState) => state.kueDataSlice);
 
   // `kueOnline` sicherstellen, dass es nur Zahlen enthält
   const kueOnline = useMemo(