chore: modernize packaging, CI, and tooling for Python 3.9+#755

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MIDHUNGRAJ wants to merge 3 commits intoXPixelGroup:masterfrom

MIDHUNGRAJ:master

Commits on Mar 2, 2026

chore: modernize project to Python 3.9+, pyproject.toml, ruff, modern CI
MIDHUNGRAJ
committed
style: apply ruff formatting and fix lint errors across codebase
MIDHUNGRAJ
committed
ci: fix lint and test failures in GitHub Actions
MIDHUNGRAJ
committed