Python 3.13 support and dependency update

[leweex95]

Updated the add-stress-to-epub to a feature branch-based installation to allow Python 3.13 integration. This is clearly not a future proof and stable solution but I have no control over the add-stress-to-epub package.

Also updated numpy to not be obsolete and didn't find any regressions so far in chatterbox functinoality.

[rsxdalv]

Thanks - let's work through a few things.

First - you targeted the master branch which is in sync with chatterbox:master - https://github.com/resemble-ai/chatterbox
this branch is not special in any way. The branches with the optimizations are faster and fast (old one).
Second, the poetry.lock file affects the project installation so it probably needs to be excluded.
Finally - I'm looking at the faster branches pyproject and I think it should be installable on Python 3.13 (maybe it needs some minor adjustments, if so, please let me know):

https://github.com/rsxdalv/chatterbox/blob/faster/pyproject.toml

[project]
name = "tts-webui.chatterbox-tts"
version = "0.4.4"
description = "Chatterbox: Open Source TTS and Voice Conversion by Resemble AI"
readme = "README.md"
requires-python = ">=3.10"
license = {file = "LICENSE"}
authors = [
    {name = "resemble-ai", email = "engineering@resemble.ai"}
]
dependencies = [
    "numpy",
    "resampy==0.4.3",
    "librosa", # ==0.10.0
    # "numpy>=1.24.0,<1.26.0",
    # "librosa==0.11.0",
    "s3tokenizer",
    "torch", # ==2.6.0
    "torchaudio", # ==2.6.0
    "transformers", # ==4.46.3
    "diffusers", # ==0.29.0
    "resemble-perth==1.0.1",
    "omegaconf", # ==2.3.0 might now be unnecessary
    "conformer",
    "safetensors",
    # "conformer==0.3.2",
    # "safetensors==0.5.3",
    "spacy-pkuseg",
    "pykakasi==2.3.0",
    # "gradio==5.44.1",
]

The reason I am bringing this all up is because it's not clear if this is meant for the optimized version, or if you're rather trying to get this merged into the official, main chatterbox.