Create dataset loader for Kamus Alay

[SamuelCahyawijaya]

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

[christianwbsn]

self-assign

[fhudi]

Hi there, does not this implementation require more consideration? Referring to discussion on #44, implementing this as paraphrasing task neglects the crucial features, i.e.: category1, category2, and category3 which is also omitted for source schema. @holylovenia @christianwbsn