update workflow

[JeremieGince]

Description

This pull request makes minor updates to the build workflow and project documentation. The workflow now targets a newer version of macOS for Intel builds, and a Codecov badge has been added to the README.md for improved code coverage visibility.

Documentation improvements:

• Added a Codecov badge to README.md to display code coverage status.

Build workflow updates:

• Updated the GitHub Actions build matrix to use macos-15-intel instead of macos-13 for the macos-x86_64 build target in .github/workflows/build_dist.yml.

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Checklist

Please complete the following checklist when submitting a PR. The PR will not be reviewed until all items are checked.

• All new features include a unit test.
  Make sure that the tests passed and the coverage is
  sufficient by running
  uv run pytest --session-timeout=600.
• All new functions and code are clearly documented.
• The code passes all pre-commit hooks.
  You can do this by running uvx pre-commit run --all-files.
• The code is type-checked using Mypy.
  You can do this by running uv run mypy src tests.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
275	275	100%	98%	🟢

New Files

No new covered files...

Modified Files

No covered modified files...

updated for commit: e37be07 by action🐍