Migrate from dev-requirements.txt to pyproject.toml for dependency management

[Copilot]

This PR updates the GitHub Actions workflows and documentation to use pyproject.toml for dependency management instead of the now-removed dev-requirements.txt file.

Changes

GitHub Actions Workflow

Updated .github/workflows/test.yml to:

• Use pyproject.toml as the pip cache dependency path instead of dev-requirements.txt
• Install dependencies using pip install -e . which reads from pyproject.toml

Before:

cache-dependency-path: 'dev-requirements.txt'
# ...
run: pip install -r dev-requirements.txt

After:

cache-dependency-path: 'pyproject.toml'
# ...
run: pip install -e .

Documentation

Updated TOOLS_GUIDE.md to reflect the new installation method:

• Repository structure diagram now shows pyproject.toml instead of dev-requirements.txt
• Test running instructions updated to use pip install -e .
• GitHub workflow examples updated to match actual configuration

Build Configuration

Enhanced .gitignore to exclude Python build artifacts:

• *.egg-info/
• __pycache__/
• *.pyc
• .pytest_cache/

Verification

The pyproject.toml file already contains pytest-playwright as a dependency, so no changes to dependencies were needed. This PR simply aligns the CI/CD pipeline and documentation with the existing project structure.

Fixes the issue where GitHub Actions would fail looking for a non-existent dev-requirements.txt file.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>I replaced dev-requirements.txt with pyproject.toml and stuff broke</issue_title>
<issue_description>Need to update the GitHub Actions configurations to work with the new pyproject.toml project, install from that instead of using dev-requirements.txt. Also update existing docs that mention dev-requirements.txt.</issue_description>

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

Fixes #77

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