Cleanup and requirements

[unixwzrd]

Help System Improvements and Documentation Updates

• Fixed directory handling in help_sys.sh process_scripts function
• Improved variable naming and error handling for directory operations
• Updated function documentation in docs/shdoc
• Enhanced markdown generation and cross-referencing
• Replaced missing requirements.txt
• Updated manifest.lst

This commit focuses on improving the help system's directory handling
and enhancing documentation generation across the project.

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This discussion was created from the release Cleanup and requirements.