Update project version from 5.0.0b5 to 5.0.1b in pyproject.toml and ytsage/__init__.py to reflect a new beta release.
Update pyproject.toml to change the project version from 4.9.7 to 5.0.0b5, marking a beta/pre-release for the upcoming 5.0 release cycle.
Replaced requirements.txt with pyproject.toml to modernize project configuration and dependency management using PEP 621 standards. This change improves compatibility with modern Python packaging tools.
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