Automate package version bumps

[laszukdawid]

Summary

• move package version source of truth to pyproject.toml
• use uv version to bump package versions in CI based on commit messages
• deploy and release from pyproject.toml version updates

Validation

• python -m py_compile .github/scripts/bump_version.py PyEMD/init.py
• git diff --check

Note: full tests were not run locally because runtime dependencies such as numpy are not installed in this environment.