Migrate to UV and add Python 3.12+ support

[Copilot]

Modernizes package management by migrating from setuptools to UV and ensures compatibility with Python 3.12+.

Changes

Build System

• Added pyproject.toml with hatchling backend (PEP 621 compliant)
• Generated uv.lock for reproducible dependency resolution
• Organized optional dependencies: test, docs, all

Python 3.12+ Compatibility

• Replaced deprecated pkg_resources with importlib.metadata:

  # Before
  import pkg_resources
  __version__ = pkg_resources.get_distribution("jsonapi-client").version
  
  # After
  from importlib.metadata import version, PackageNotFoundError
  try:
      __version__ = version("jsonapi-client")
  except PackageNotFoundError:
      __version__ = "0.9.10"

• Updated classifiers for Python 3.9-3.13

CI/CD

• Added GitHub Actions workflow with UV for Python 3.9-3.13 matrix testing
• Configured proper security permissions

Developer Experience

• Updated README with UV installation and development workflows
• Maintained backward compatibility via setup.py shim
• Both uv sync --all-extras and pip install -e ".[all]" supported

Installation

# With UV (recommended)
uv pip install jsonapi-client

# Development
uv venv && uv sync --all-extras

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• astral.sh
  • Triggering command: curl -LsSf REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Upgrade Python support for 3.12+</issue_title>
<issue_description>ensure compatibility with Python 3.12+</issue_description>

<agent_instructions>Propose a PR for migrating from setuptools to UV for package management</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Upgrade Python support for 3.12+ #2

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[h3r2on]

seems reasonable, looks like we have some work to do on those tests but that can be for another issue