Add prek and useful pre-commit hooks

[amureki]

No description provided.

[Copilot]

Pull request overview

This pull request adds comprehensive pre-commit hook configuration and integrates prek for automated code quality checks in CI. The changes also apply consistent formatting across markdown documentation and YAML workflow files.

• Adds 7 pre-commit hooks including trailing-whitespace, pyupgrade, django-upgrade, mdformat, ruff, and yamlfmt
• Integrates prek-action into the CI lint workflow for automated pre-commit hook execution
• Applies formatting changes from mdformat and yamlfmt to documentation and workflow files

Reviewed changes

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

Show a summary per file

File	Description
.pre-commit-config.yaml	Adds comprehensive pre-commit hooks for Python, Django, Markdown, and YAML with tools like pyupgrade, django-upgrade, ruff, mdformat, and yamlfmt
.github/workflows/ci.yml	Adds prek-action for pre-commit hook execution and applies yamlfmt formatting (removes blank lines, standardizes array syntax)
.github/workflows/release.yml	Applies yamlfmt formatting by removing extraneous blank lines
chrome-extension/README.md	Applies mdformat changes including whitespace cleanup and markdown list formatting standardization
chrome-extension/PRIVACY.md	Applies mdformat changes including table alignment, whitespace cleanup, and list formatting
README.md	Changes Python code example from single quotes to double quotes (ruff/black formatting)

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