feat(compat): vendor alexandria for the bring-up flagship (cave#160)Verified

6 of 11 core files already load clean under build/funcl (package,
definitions, binding, strings, conditions, io — define-condition and
in-package work). First blocker: macros.lisp macro-expansion binds N
where a list is expected — filed with repro. Driver: chain loads in
asd serial order.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>