Remove the dependency to jQuery

[GerkinDev]

I suggest that this lib drops the dependency to jQuery. In fact, we should let the choice of such library to the application, instead of forcing the app to use it.

More and more tools & frameworks allows the user not to use jQuery, such as VueJS, Angular, React, etc etc... Even Bootstrap 5 has an open and active pull request to drop it, while it does much more DOM manipulation than Xonomy !

So, because a full rewrite is planned anyway (see #41), this could be a really nice thing to drop the only dependency, and replace it with native DOM methods or much smaller dependencies.

Final bonus: You might not need jQuery (and actually I really think you don't)