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/context/LibraryOptionsContext.tsx

@@ -6,6 +6,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 import React, { useContext } from 'react';
+import { LibraryOptions } from 'typings';
 
 type ContextType = {
     options: LibraryOptions;