Use pyproject & friends

[ccrisan]

Issue

• Use pyproject.toml to configure the entire project.
• Use poetry to build the package and manage deps.
• Use ruff for Python linting.
• Use bandit for code auditing.
• Update CI workflows accordingly.

How

Screenshots

References

Checklist

• Tests added
• Cleaned up commit history (rebase!)
• Documentation added
• Thought about variable and method names

[shawaj]

Not really related to this PR, but just an FYI - for the building and shipping to PyPI - instead of manually running that GitHub action you can just use the GitHub Release flow as described here - https://github.com/NebraLtd/hm-pyhelper#releasing

Just using that and setting up the tags and using the auto generated release notes like shown here - https://github.com/NebraLtd/hm-pyhelper/releases/tag/v0.14.10

Then it auto triggers the build and lists all the wheel files and such in the releases.

[shawaj]

also as per comment on hm-diag - wondering if we should add bandit (as we have it in hm-config but not in other repos it seems)

[sonarqubecloud]

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