Add Typescript

[newtoallofthis123]

Hey! Really cool project. Although, when I was trying to modify it for my own use, I came across a lot of silly JavaScript errors that would could have easily been avoided using typescript. I can work with typescript quite well, so I would like to contribute to the project by rewriting the files in typescript.

I know this is a huge change, so it can be done on a separate branch. I work a lot with typescript, so I am confident I will be able to help.

I can please get assigned this issue?

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