Script helpers by modders for modders

[TheGreatCthulhu]

^That's not a bad idea. I think you can mostly just wrap existing functions with the ones in your library. You can probably make it all in one .hps file. (Some aspects could prove tricky (or not), but if something too tricky comes along, you might be able to simply omit it - as long as the library supports the most used/useful functions, it should be fine.)
Using it should then just be a matter of a adding a single #include.