Refactor the sphinx_gated_directives extension to support configurable suffixes and separator for start/end directives, and add an 'override_existing' option for more flexible directive registration. Update the registry naming and logic throughout the extension, add configuration validation, and update the book config and intro to demonstrate new exercise directives and nesting.
Improved code structure and comments in sphinx_gated_directives/__init__.py, clarified logic, and removed unused/legacy code. Updated intro.md to remove commented-out directive examples and replaced them with active ones for better demonstration and testing.
Changed the label from 'A child theorem' to 'A child axiom' in the intro.md file for clarity. Added 'sphinx-tudelft-theme==1.2.1' to requirements.txt to specify the documentation theme.
Added a robust validate_SE function to check for correct nesting of start and end directives, with detailed error reporting. Updated the CheckGatedDirectivesTransform to use this validation and improved error messages for mismatched or incorrectly nested directives. Extended intro.md with comprehensive examples of nested directives, including both valid and invalid cases, to document and test the new behavior. Also added the sphinx_tudelft_theme extension in _config.yml.
Added a new SVG file 'nothing.svg' and updated the intro.md to use this image in place of the previous logo-wide.svg. Adjusted figure attributes and alt text accordingly.
Debug logging statements were removed from MergeGatedDirectivesTransform in sphinx_gated_directives. The intro.md file was updated to include new theorem and figure directive examples, code cells, and additional documentation content.
