Migrate documentation to markdown book or web view format

[jwilles]

Summary:
Migrate the current documentation to a markdown book or web view format for better accessibility and navigation.

Background:
The current documentation format may limit user experience and discoverability. Transitioning to a markdown book (e.g., using mdBook or similar) or a web-based documentation viewer will make it easier for users to read, search, and contribute to the docs.

Tasks:

• Evaluate current documentation structure.
• Select an appropriate markdown book or web view tool (e.g., mdBook).
• Migrate all documentation files to the new format.
• Update navigation, links, and structure as needed.
• Test new documentation build and deployment.
• Update README and contributor guides to reference the new docs system.