Create dataset loader for NERGrit

[SamuelCahyawijaya]

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

Dataset	ner_grit
Description	NER dataset is a NER dataset taken from the Grit-ID repository, and the labels are spans in IOB chunking representation. The dataset consists of three kinds of named entity tags, PERSON (name of person), PLACE (name of location), and ORGANIZATION (name of organization).
License	Unknown

[cahya-wirawan]

self-assign