Add SLAM pronunciation to user dictionary (#22)

Fix pronunciation of 前頭* terms to 'zentou' (#20)

feat: 🧠 Add cognitive neuroscience terms to user dictionary (#12)

feat: Add new user dictionary entries for common Japanese terms (#8)

feat: Add Hz and KV entries to user dictionary (#5)

feat: Add new entries to user dictionary

refactor: Remove VOICEVOX_CORE_AVAILABLE flag and assume successful import

style: Apply comprehensive ruff formatting across entire codebase

feat: Migrate from isort, black, flake8 to ruff for unified linting and formatting

fix: Update Python version in mypy configuration and add type ignore for word_type in user dictionary creation

feat: Add VOICEVOX user dictionary support with custom pronunciations