chore(ci,docs): align Python to 3.11 and update docs — Resolves #1961

[Anselmoo]

Which issue(s) does this Pull Request fix?

resolves #1961

Summary

Align CI, container images, and documentation with pyproject.toml (Python >= 3.11). This also includes documentation updates and a follow-up note to update ipynb metadata.

Details of the Pull Request

• What changed:
  • .devcontainer/Dockerfile
  • .github/workflows/actions.yml
  • README.md
  • docker/pre-commit.Dockerfile
  • docs/tutobooks.py
  • pyproject.toml
• Why: pyproject.toml requires Python >= 3.11; aligning CI and container images prevents version mismatch and ensures consistent build/test environments.
• Impact: Backwards-compatible (non-breaking); CI and docs now use Python 3.11+.

Documentation & Notes

• Follow-up: update notebook/ipynb metadata as noted in commit message.

Checklist

• I added/updated tests (if applicable)
• I updated relevant documentation
• CI passes locally
• This PR is ready for review (or mark as Draft if still in progress)

[gemini-code-assist]

Summary of Changes

Hello @Anselmoo, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request standardizes the Python version across the project to 3.11, aligning the development environment, CI/CD pipelines, and documentation with the pyproject.toml configuration. This change ensures consistent build and test environments, preventing version mismatches and facilitating future development, all while remaining backwards-compatible.

Highlights

• Python Version Upgrade: The project's core Python requirement has been updated to Python 3.11, ensuring compatibility with pyproject.toml and modern development practices.
• CI/CD and Development Environment Alignment: Continuous Integration workflows, development containers, and pre-commit Docker images have all been updated to use Python 3.11, providing a consistent and up-to-date environment.
• Documentation and Metadata Updates: The README.md and notebook generation scripts (docs/tutobooks.py) have been revised to reflect the new Python 3.11 and Keras 3.0.0 requirements, along with minor formatting improvements.

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Ignored Files

• Ignored by pattern: .github/workflows/** (1)
  • .github/workflows/actions.yml

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[gemini-code-assist]

Code Review

This pull request effectively aligns the project with Python 3.11 by updating the required version in pyproject.toml, Dockerfiles, and documentation. The changes are consistent across the repository. I've added a couple of minor suggestions to improve code style in pyproject.toml and formatting in README.md.

[gemini-code-assist]

This empty heading (##) and the following blank line appear to be unintentional. They create unnecessary vertical space and can be confusing. It would be cleaner to remove them.

[gemini-code-assist]

For better readability and to maintain consistency, it's a good practice to sort the classifiers alphabetically. This makes it easier to see which Python versions are supported at a glance.

Suggested change

	"Programming Language :: Python :: 3",
	"Programming Language :: Python :: 3.11",
	"Programming Language :: Python :: 3.12",
	"Programming Language :: Python :: 3 :: Only",
	"Programming Language :: Python :: 3",
	"Programming Language :: Python :: 3 :: Only",
	"Programming Language :: Python :: 3.11",
	"Programming Language :: Python :: 3.12",

[Anselmoo]

I used the original notation of keras