Typings - create index.d.ts file

create index.d.ts file with types for all components and hooks, maybe use `@types/spotify-api` (https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/spotify-api) and `@types/spotify-web-playback-sdk` (https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/spotify-web-playback-sdk)