Replace install.py with standard requirements.txt

install.py was running arbitrary pip installs as part of node loading,
which is dangerous in a shared venv. Standard approach: requirements.txt
lists the safe deps (transformers, accelerate, soundfile, etc.);
omnivoice itself must be installed once manually with --no-deps to avoid
overwriting ComfyUI's torch. README documents this clearly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

requirements.txt

@@ -1,4 +1,6 @@
-# Dependencies are managed by install.py to avoid overwriting ComfyUI's torch.
-# omnivoice pins torch==2.8.* (CUDA 12.8) which would break ComfyUI's torch build.
-# Do not add omnivoice here — install.py handles it with --no-deps.
-# EPUB parsing (OmniVoiceEpubLoader) requires beautifulsoup4 (installed by install.py).
+transformers>=4.40.0
+accelerate
+pydub
+soundfile
+numpy
+beautifulsoup4