Feature/use second level mui imports (#743)

* Require "Theme" to be passed to "SxProps"

Decreases typescript performance otherwise

* Disallow "top" and "third-level" MUI imports

* Exclude "node_modules" in tsconfig

src/screens/settings/DefaultReaderSettings.tsx

@@ -7,7 +7,7 @@
  */
 
 import { useContext, useEffect } from 'react';
-import { Box } from '@mui/material';
+import Box from '@mui/material/Box';
 import CircularProgress from '@mui/material/CircularProgress';
 import { useTranslation } from 'react-i18next';
 import { AllowedMetadataValueTypes, IReaderSettings } from '@/typings';