Pluggable abbreviations

Org rifle is great, I use it often and it gave me an enhancement idea.

For example, I search my notes for javascript stuff. I find it quickly, but it's annoying to type javascript or even javas often. Why can't I type js instead?

So I'd like to see a pluggable abbreviation feature where I could specify an alist for custom abbreviations.

E.g.

`(setq org-rifle-abbrevs '(("js" . "javascript") ("ga" . "google analytics") ...))`

With this set I could search for "js timer" and it would return "javascript timer" entries too. (And also the original "js" matches in case one wants to search for the original input, not the expanded abbreviation.)