HS parser: fix number+comparison keyword collision, eval-hs uses hs-compile

Parser: skip unit suffix when next ident is a comparison keyword
(starts, ends, contains, matches, is, does, in, precedes, follows).
Fixes "123 starts with '12'" returning "123starts" instead of true.

eval-hs: use hs-compile directly instead of hs-to-sx-from-source with
"return " prefix, which was causing the parser to consume the comparison
as a string suffix.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

sx/sx/hyperscript-spec.sx

@@ -2,7 +2,6 @@
 ;; SX Implementation — Formal Reference
 
 (defcomp
-  ~hyperscript/spec-content
   ()
   (~docs/page
     :title "_hyperscript Language Specification"