Add tsc type generation

[KonradLinkowski]

Hi,

This is my proposal for #29 and maybe after changes for #24

• Adds typescript dependency
• Removes microbundle dependency
• Modifies tsconfig.json
• Adds a lot of JSDoc comments

This is a draft!
Notes:

• I tried a few things to tell typescript that Checkboxland in src/index.js is extended with plugins but I didn't manage to find a good solution yet.
• Some of the function descriptions where generated by github copilot. I've read them to make sure that they make sense but I might've missed something silly.
• Typing variables and functions within methods might be a bad idea actually, because it makes them less readable (e.g. var $i = function(/** @type {number} */ x, /** @type {number} */ y) {) - let me know what do you think.