Bundle default hints within gem

[jelaniwoods]

Related to https://github.com/appdev-projects/omnicalc-1-forms-practice/issues/2

[bpurinton]

The immediate issue was resolved: https://github.com/appdev-projects/omnicalc-1-forms-practice/issues/2#issuecomment-3482787720

But it would be wise to bundle hints with grade runner to DRY things up and avoid this scenario in the future.

Not super high priority though.