Update CI workflow to use setup-uv for Python setup

[Borda]

This pull request updates the CI workflow to use the astral-sh/setup-uv action for setting up Python environments and installing dependencies, streamlining the process and removing redundant steps.

CI workflow improvements:

• Replaced the actions/setup-python action with astral-sh/setup-uv to set up Python and manage environments more efficiently (.github/workflows/ci.yml).
• Simplified dependency installation by removing manual upgrades and using uv pip install -r requirements-dev.txt directly (.github/workflows/ci.yml).

cc: @ternaus

Summary by Sourcery

Update the CI workflow to use uv for Python setup and dependency installation.

CI:

• Switch CI Python setup from actions/setup-python to astral-sh/setup-uv with environment activation.
• Simplify CI dependency installation to a single uv pip install of development requirements.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Updates the CI workflow to use astral-sh/setup-uv for Python setup and dependency installation, simplifying steps and relying on uv-managed environments.

File-Level Changes

Change	Details	Files
Switch CI Python setup from actions/setup-python plus manual uv installation to astral-sh/setup-uv with environment activation and simplified dependency installation.	Replace actions/setup-python with astral-sh/setup-uv to install uv and configure the requested Python version from the matrix. Enable automatic environment activation via the setup-uv action instead of relying on system Python. Remove manual uv installation and --system flag usage in favor of a direct uv pip install of development requirements. Rename and simplify the dependency installation step to a single uv pip install -r requirements-dev.txt command. Tidy the pre-commit step by using a single-line run: pre-commit run --all-files.	.github/workflows/ci.yml

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[sourcery-ai]

Hey - I've left some high level feedback:

• Consider pinning an explicit uv-version in astral-sh/setup-uv@v5 to avoid unexpected CI breakages from future uv releases.
• Now that uv manages the environment and you’ve dropped --system, double-check that any tools invoked later in the workflow (like pre-commit) are expected to come from the activated uv environment and not from a system/global install; if not, you may want to make that assumption explicit in the workflow name or comments.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider pinning an explicit `uv-version` in `astral-sh/setup-uv@v5` to avoid unexpected CI breakages from future uv releases.
- Now that `uv` manages the environment and you’ve dropped `--system`, double-check that any tools invoked later in the workflow (like `pre-commit`) are expected to come from the activated uv environment and not from a system/global install; if not, you may want to make that assumption explicit in the workflow name or comments.

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[Copilot]

Pull request overview

This PR modernizes the CI workflow by replacing the traditional Python setup process with the astral-sh/setup-uv action, streamlining dependency installation and reducing workflow complexity.

Changes:

• Replaced actions/setup-python@v5 with astral-sh/setup-uv@v5 for Python environment setup
• Removed manual pip install --upgrade uv step by using the dedicated setup-uv action
• Simplified dependency installation command by removing the --system flag and using virtual environment management
• Cleaned up workflow syntax by converting multi-line run commands to single-line commands where appropriate

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[ternaus]

Thanks! This is a good. Faster CI is always a bliss.