update development setup with uv and adjust dependencies in pyproject.toml

[SvenKlaassen]

No description provided.

[Copilot]

Pull request overview

Updates the project’s development setup to support uv and PEP 735-style dependency groups, aligning docs and CI installation commands with the new dependency organization.

Changes:

• Move mypy into a dev dependency group and introduce [dependency-groups] in pyproject.toml.
• Update contributor/developer documentation to recommend uv and adjust example install/tooling commands.
• Add .python-version (Python 3.12) and ignore uv virtualenv/lock artifacts; update CI to install dev dependencies via --group dev.

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
README.md	Updates listed dependency name and adds uv-based development setup guidance.
pyproject.toml	Introduces [dependency-groups] and places mypy under the dev group.
CONTRIBUTING.md	Refreshes wording and updates setup/tooling commands to show uv and pip --group usage.
.python-version	Pins the development Python version to 3.12.
.gitignore	Adds ignores for uv artifacts (.venv/, uv.lock) and removes a duplicate entry.
.github/workflows/pytest.yml	Updates CI install command to use --group dev with the rdd extra.

Comments suppressed due to low confidence (1)

.github/workflows/pytest.yml:53

• Since pip install -e ".[rdd]" --group dev already installs pre-commit (it’s in the dev dependency group), the subsequent pip install pre-commit is redundant and adds time/variance to CI. You can invoke pre-commit directly in the next step.

        pip install -e ".[rdd]" --group dev

    - name: Run pre-commit checks
      run: |
        pip install pre-commit

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