remove manually created typing d ts file (#249)

* Rename file

".d.ts" files are files that are automatically generated during compilation (in case option is set) and shouldn't be created manually.

* Export types and interfaces

* Add missing imports

src/screens/SourceConfigure.tsx

@@ -15,6 +15,7 @@ import EditTextPreference from 'components/sourceConfiguration/EditTextPreferenc
 import MultiSelectListPreference from 'components/sourceConfiguration/MultiSelectListPreference';
 import List from '@mui/material/List';
 import cloneObject from 'util/cloneObject';
+import { SourcePreferences } from 'typings';
 
 function getPrefComponent(type: string) {
     switch (type) {