chore: clean up pyproject.toml

[MaleicAcid]

Dependencies Removed

The following packages are not directly imported anywhere in the openlrc/ source tree and have been removed from [project] dependencies:

Package	Reason for removal
punctuators	Never imported. Punctuation handling in openlrc is done with custom string replacement logic, not this library.
pandas	Never imported.
matplotlib	Never imported.
aiohttp	Never imported.
soundfile	Never imported. If upstream libraries (e.g. faster-whisper) depend on it, they should declare it in their own dependencies.
ctranslate2	Never imported. This is a runtime dependency of faster-whisper, which should declare it itself.
typing-extensions	Never imported. Commonly pulled in as a transitive dependency by other packages.

Dependencies Added

Package	Reason
pip>=25.1	Required at runtime by spacy.cli.download(), which is called in openlrc/utils.py:spacy_load() to auto-download missing spacy language models. Without pip installed in the virtual environment, this auto-download fails with No module named pip.