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/components/reader/pager/DoublePagedPager.tsx

@@ -10,6 +10,7 @@ import ReactDOM from 'react-dom';
 import { Box } from '@mui/system';
 import Page from 'components/reader/Page';
 import DoublePage from 'components/reader/DoublePage';
+import { IReaderProps } from 'typings';
 
 const isSpreadPage = (image: HTMLImageElement): boolean => {
     const aspectRatio = image.height / image.width;