Swapping out the js template engine isn't a simple thing. It certainly can be done, but it'd involve a reasonable amount of reworking to change.
If you're less experienced with js I wouldn't recommend it off hand.
If you did want to dig in and give it a try, the first step would be to create your own clone of the bundled searchplus.js, found in the
Within that there are a few key parts, from line 48 you'd see the various
Hogan.compile markers which would need changing, and then each of the separate
renderPagination() etc.. would need updating.
Most of those methods are dedicated to handling the logic, with the last lines of them finally passing the data down to Hogan, which looks like :
Your swig version would replace that