Width and height argtypes, kdesc --argtypes from ref/, txt @define/@left_right/@columns, kdiag --check value validation (from dev d6993110e9b3)

Also: the klammertext argtype (descriptions kept as source), txt table
wrapping and :hpos/:offset, @c between ‹ ›, txt section headings, the
ktext newline-only trim, capitalize(), and the argtype test suite.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

sks/list/sty/list.sty

@@ -6,7 +6,7 @@
 \setlistdepth{9}
 \renewlist{enumerate}{enumerate}{9}
 \renewlist{itemize}{itemize}{9}
-\setlist{topsep=0pt, partopsep=0pt, parsep=2pt, itemsep=0pt}
+\setlist{topsep=0pt, partopsep=0pt, parsep=.5\parskip, itemsep=0pt, labelindent=8pt, leftmargin=16pt}
 \setlist[enumerate]{label*=\arabic*.}
 \setlist[itemize,1]{label=\textbullet}
 \setlist[itemize,2]{label=\normalfont\bfseries\textendash}