Add .cspell.json and markdown-link-check-config.json to the
docs-check workflow trigger paths so spelling and link check
config changes are properly validated.
- Introduced a new script to build an EPUB from markdown files, enhancing documentation accessibility.
- Added a GitHub Actions workflow for automated EPUB builds on version tag pushes.
- Created the initial EPUB file 'claude-howto-guide.epub' for distribution.
This update streamlines the process of creating and releasing the Claude How-To guide in EPUB format.