Okay for those interested, I have added an Insert Aria Clips menu item and all of the support code around it and pushed the whole thing to master on my personal github site.
It is all very rough for now. Still Proof of Concept but if you build your own please pull from my repo:
https://github.com/kevinhendricks/Sigil
And fire up an empty epub3 and play around with those Aria clips templates.
If people like this approach, then I will work on a way to save and read that set of clips from an ini or xml file so that more advanced users can modify these clip templates to match their own needs. Right now they are all hardcoded in Misc/AriaClips.cpp and .h.
Please give it a try and let me know what you think of this idea/approach.
If people are generally happy, I will move this into Sigil master and make a broader CI set of betas for additional people to play with.
Thanks!