feat(postagger): __repr__ 및 is_trained 추가

[lovit]

관련 이슈

closes #236

변경 내용

postagger 주요 클래스에 상태 가시성을 추가한다.

Dictionary

>>> repr(dictionary)
"Dictionary(num_tags=4, num_words=14, tags=['Noun', 'Verb', 'Josa', 'Adverb'])"

BaseTagger / SimpleTagger

>>> repr(tagger)
"SimpleTagger(generator=EojeolTemplateMatcher, evaluator=SimpleEojeolEvaluator, postprocessor=None)"

LRMaxScoreTagger

>>> tagger = LRMaxScoreTagger()
>>> tagger.is_trained   # False (lrgraph 없음)
>>> repr(tagger)
"LRMaxScoreTagger(trained=False, vocab_size=0, lrgraph_lmax=12, lrgraph_rmax=8)"
>>> tagger.pos("나는")   # 미학습 경고 로그 출력

POSExtractor

>>> extractor = POSExtractor()
>>> extractor.is_trained   # False
>>> repr(extractor)
"POSExtractor(trained=False, l_max_length=10, r_max_length=8)"

🤖 Generated with Claude Code