feat: typescript ci

[o-az]

add support for linting, building and testing typescript implementation.

Next I will add an action to publish npm package.

[o-az]

currently this action is configured to only run if typescript/ path is affected. Should I remove the condition to make it always run? I'm thinking that might be better and more straightforward.

cc @sslivkoff

[sslivkoff]

yea lets run it in all cases. definitely want it to run whenever the tests/ dir is updated, and possibly other times too