* Brand new book docs

* Consolidate docs

* Add SEO optimizations to the book

- Add meta tags for better SEO

- Create sitemap generation script

- Add robots.txt file

- Add custom CSS and JS for improved readability and structured data

- Create build script to automate the process

- Update book.toml with additional metadata and configuration

Signed-off-by: Ian Ker-Seymer <hello@ianks.com>

* Update publishing

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Signed-off-by: Ian Ker-Seymer <hello@ianks.com>

* Define RUBY_DEBUG macro if undefined

Add a check and default definition for RUBY_DEBUG to ensure compatibility when RUBY_DEBUG is not already defined.

* Fix TYPED_DATA_EMBEDDED flag for 32/64-bit targets

Ensure correct flag type is used for pointer width, preventing mismatched types on 32-bit and 64-bit architectures.

* Refine ruby debug and assert header inclusion

Replace RUBY_DEBUG guard with HAVE_RUBY_ASSERT_H, include ruby/assert.h when available, and remove manual RUBY_DEBUG definition.

* Update Docker workflow and fix RUBY_DEBUG reference

- Trigger Docker workflow on docker branches
- Fix RUBY_DEBUG path in debug_ruby_assert_type macro

* Move ruby/assert.h include after other headers

Relocate ruby/assert.h inclusion to the end and add RUBY_DEBUG fallback if not present. Ensures correct header order and macro definition.

* Remove ruby/assert.h include and update debug macro

Remove conditional inclusion of ruby/assert.h from wrapper.h.
Update debug_ruby_assert_type! macro to use cfg(ruby_ruby_debug).

* Prevent unused variable warnings in debug macro

Add code to use macro arguments when debug is disabled to avoid compiler warnings.