Even better, there are rule templates. Rule Templates - openHAB Community. Why copy/edit when you an install and configure. This is way better than Cargo cult programming - Wikipedia which I’m afraid, based on my years experience here on the forum, a wiki like you propose, would encourage.
There is also the Tutorials and Solutions section of the forum which is intended for such examples. There are a number of ECMAScript 11 examples there already and more would be welcome.
Most of the Design Pattern posts do not have an ECMAScript 11 example because it’s either been implemented as a rule template or it’s been implemented in openHAB Rules Tools Announcements. With few exceptions, you shouldn’t be implementing the Design Patterns yourself any longer.