Create dataset loader for ID Short Answer Grading

[SamuelCahyawijaya]

https://indonlp.github.io/nusa-catalogue/card.html?id_short_answer_grading

[SamuelCahyawijaya]

I think this one can be framed as nusantara_pairs schema with text_1 denotes question and text_2 denotes answer, and the label is the score.

[rayendito]

self-assign

[holylovenia]

Btw, it seems that this issue needs a new task to be declared. Should I add a new constant for SHORT_ANSWER_GRADING task? @SamuelCahyawijaya @afaji @bryanwilie @gentaiscool

[SamuelCahyawijaya]

@holylovenia : yes, that would be great! I agree that we need to add a new task for this.