Format and lint with ruff

[enryH]

This pull request primarily focuses on code style consistency by standardizing string quoting (switching from single to double quotes) and improving formatting across the codebase and documentation configuration. It also updates the CI workflow to specify source paths for linting tools and modifies the test matrix to skip Windows and add Python 3.13. Functional changes are minimal, with most updates being stylistic.

Key changes include:

CI Workflow Improvements:

• Updated .github/workflows/ci.yaml to specify the pimmslearn directory for black and isort, ensuring linting tools only process relevant source files.
• Modified the test matrix to skip Windows (due to a tk/tcl issue) and added Python 3.13 to the supported versions.

Code Style Consistency:

• Standardized all string literals to use double quotes instead of single quotes throughout pimmslearn/__init__.py, pimmslearn/analyzers/__init__.py, and pimmslearn/analyzers/analyzers.py. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16]

Documentation Configuration:

• Reformatted docs/conf.py for consistency, using double quotes, condensing list formatting, and improving readability. No functional changes to documentation generation. [1] [2] [3] [4] [5] [6]

These changes should make the codebase more consistent and maintainable, with improved clarity for future contributors.