Use UV and pre-commit.ci in CI suite

[codingjoe]

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[Copilot]

Pull request overview

This PR modernizes the CI suite by adopting UV (a fast Python package manager) and introducing pre-commit.ci for automated code quality checks. The changes replace traditional pip-based workflows with UV commands and remove the separate lint job in favor of pre-commit hooks.

• Replaced pip-based dependency management with UV's uv run commands across CI workflows
• Migrated from [project.optional-dependencies] to [dependency-groups] in pyproject.toml for UV compatibility
• Added comprehensive pre-commit configuration with hooks for formatting (ruff), upgrading (pyupgrade, django-upgrade), and various code quality checks

Reviewed changes

Copilot reviewed 11 out of 13 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
.pre-commit-config.yaml	Introduces new pre-commit configuration with hooks for code quality, formatting, and linting
pyproject.toml	Migrates dependency specification from [project.optional-dependencies] to [dependency-groups] format; removes redundant selenium group
.github/workflows/ci.yml	Replaces pip-based commands with UV; removes separate lint job; streamlines Python and Django version testing
.github/workflows/release.yml	Updates to use UV for building packages (uvx commands)
CONTRIBUTING.rst	Updates documentation to reflect UV-based development workflow
.readthedocs.yaml	Removes unnecessary blank lines for cleaner formatting
.gitignore	Adds uv.lock to ignore UV's lock file
tests/test_forms.py	Code formatting changes to assertion statements (auto-formatted by ruff/black)
example/manage.py	Adds blank line after docstring (formatting fix)
docs/extra.rst	Removes trailing whitespace and extra blank line at end of file
MANIFEST.in	Removes trailing blank line
.github/dependabot.yml	Fixes indentation for YAML consistency
.github/ISSUE_TEMPLATE/bug.yml	Removes unnecessary blank lines for cleaner formatting

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