The requirements name SBCL alone, the platform page describes cl-vk/sys
as what cl-vk takes from SBCL, and the test commands and the generator's
reason for laying out its output by hand no longer mention CCL. The
allocation claims drop their "on SBCL".
Add the reference pages and the sidebar; document enum keyword rules
Add API Reference, Errors, Lifetimes and Threads, Raw FFI Layer,
Generator and Registry, and Platforms and Testing. State the full rules
for enum keywords, including the prefix word kept before a digit
(:type-2d), and use :type-2d in the image view recipe.
