Python PEP8 format (#1)

fix: normalize some punctuation and special characters in text_to_ipa function

feat: rename EXTRA_G2P to EXTRA_FORMOSAN_G2P and update load_g2p function to handle lists, enhance text processing

fix: delete g replace

feat: add language selection and update IPA processing to support multiple languages

feat: change ipa parser to support ŋ

feat: add app.py