Here's the fastest way of implementing support in the IDE for any/all of the above:
Finish the wizard and you'll have a new class extending WebFrameworkProvider, with placeholders for all the methods. All the necessary import statements are also included.
Now, when you install the module, you'll see a new entry for your WebFrameworkProvider, in the New Project wizard for web applications, in the Frameworks panel. To extend that class, read pilot-chapter-registering-a-framework-4.pdf. (And send me comments on that chapter, while you're at it.)
The registering of the WebFrameworkProvider class and the dependency on Web APIs should also be provided by the wizard, ultimately. But the current version is just a quick implementation of the NetBeans File Template Module Tutorial.
In other news. In the category "You know you have a cool job when...", my ultimate entry is: "...you fall asleep on the job and colleagues take pictures of you instead of rudely waking you up." Evidence from yesterday, thanks to colleague Rudolf Balada: