In order to push upward the code quailty of the Javascript code, I propose to introduce Typescript and Vitest for writing unit tests.
This first commit simply introduce the right dependencies and configuration.
Note the presence of “happy-dom” dev dep for manipulating the window object (which is involved in the first test written on Utils).
Signed-off-by: Cédric Foellmi <cedric@onekiloparsec.dev>
