Added types for single-type players

[JuanM04]

This PR solves #953

What I did:

• Created a folder named types with all the typings.
• Added cp types/*.d.ts . to npm run prepublishOnly, so the types will be detected.
• Added utilities to types/_utils.d.ts.
• Added linting with npm run lint:ts

[afzaalahmad]

@JuanM04 please make sure to use proper commit messages. It would be awesome to use git interactive rebasing and merge these all commits into one commit with proper message added player typings.

Regards

[JuanM04]

@afzaalahmad merging all the commits into one would be awesome. If there is something I can do to help, please tell me

[cookpete]

It would be awesome to use git interactive rebasing and merge these all commits into one com

There's no need as I'm using squash and merge in this repo, so the commits will be squashed into one merge commit anyway.

[isometriq]

types for custom players would be awesome too

[cookpete]

Amazing work 💪

I managed to break everything when trying to rebase on master and force push (accidentally force pushed my master rather than my rebased branch of your master) so I'll merge this manually.