Migrate UV and long-s demos to latincy-preprocess package

Add parsing About tab to demos

Add About tab to NER demo

Add About tab to parsing demo

Add About tabs to all 7 remaining Streamlit demos

Add U/V normalizer demo (page 8) and latincy-uv dependency

Update demo texts and fix morph word selector persistence

Adjust similarity results slider to 1-10, default 3

Fix duplicate widget key error in dependency demo

Update parsing demo to UD/CoNLL-U column format

Add 4 new dashboard demos: NER, dependency trees, word similarity, morphology

Add newline character to end of export output

Add senter demo

Update model in parsing demo

Update requirements/models

Update repo

Update text limit

Fix typo

Update dashboard