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/SourceMangas.tsx

@@ -17,6 +17,7 @@ import AppbarSearch from 'components/util/AppbarSearch';
 import { useQueryParam, StringParam } from 'use-query-params';
 import SourceGridLayout from 'components/source/GridLayouts';
 import { useLibraryOptionsContext } from 'components/context/LibraryOptionsContext';
+import { IManga, IMangaCard, ISource, ISourceFilters } from 'typings';
 
 interface IPos {
     position: number;