Add TypeScript support

[The-CodingSloth]

Currently using JavaScript throughout this whole extension and that's some Junior Developer behavior. TypeScript support would help a lot and make this look more professional because we're all 10x developers here.

Here's a link for chrome type package to get started:
chrome type package

[slav-getov]

Hey, idk if this was intentional but the link you provided does not actually lead to where you want - it leads to: 'https://github.com/The-CodingSloth/haha-funny-leetcode-extension/issues/url'.

Anyways, for anyone else interested @The-CodingSloth wanted to link here. Thank you for making that video on the extension!

[The-CodingSloth]

haha thanks so much I'm dumb sometimes

[green1490]

I rewrote the codebase into typescript besides the test scripts. The only thing that is left is to handle undefined cases to reduce the spaghetti.