Add ESLint and Typescript

[thebrandonlucas]

Add ESLint and Typescript to improve code quality and maintainability, and automate running them on staged files prior to commits using lint-staged and husky (husky added in #31).

Will be adding the following packages:

• https://github.com/eslint/eslint
• https://github.com/okonet/lint-staged
• https://github.com/sveltejs/eslint-plugin-svelte3
• https://github.com/typescript-eslint/typescript-eslint

Using this guide.

I am available to work on this if we'd like to add.

[secondl1ght]

Thanks for the suggestion @thebrandonlucas, I don't think I want to add either of these at this time but I will keep this issue open and we can revisit in the future.

[thebrandonlucas]

Thanks for the suggestion @thebrandonlucas, I don't think I want to add either of these at this time but I will keep this issue open and we can revisit in the future.

Works for me :)

[secondl1ght]

✅