txt section numbering, @typeface :middle/:lift and html scale, NewGardinerOmni, html :leading (from dev 9fa469dd74ed)

Section headings under txt are numbered inside a @document only; @typeface
gains :middle and :lift and its :scale now means the same in html and
pdf; NewGardinerOmni ships (OFL 1.1, Mark-Jan Nederhof) and @egyptian /
@chinese replace @cjk; @table :leading and :colsep reach html; kdesc
--typeface help names the flag; @document.txt is a Python class.

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

sks/font/font.k

@@ -26,13 +26,28 @@ font as document text instead of setting anything.  @typeface is the
 temporary, all-target replacement.
 ]#
 
-@@typeface.k name | text :scale.float 1.0 :
+@@typeface.k name | text :scale.float 1.0 :middle.bool :lift.length :
 A temporary change of typeface for *text*: the typeface *name* is
 resolved in the Klammertext font store (the directories of
 KLAMMERTEXT_FONTS, then the distribution's own), and the document
 declares and localizes it automatically -- writing this klammer is the
-only declaration needed.  *scale* multiplies the surrounding text size,
-which a script whose glyphs are drawn small usually wants.
+only declaration needed.  *scale* multiplies the size of the surrounding
+text as it appears, the same in html and pdf, which a script whose glyphs
+are drawn small usually wants.
+
+*middle* centres *text* on the surrounding line instead of standing it on
+the baseline -- for a script with no baseline relationship to the text,
+such as hieroglyphs, whose font declares a tall ascender that would
+otherwise open up every line the glyphs sit in.  Html only: in tex a
+row is already as tight as its tallest glyph.  Never for a Latin
+typeface, whose baseline must stay shared with the text around it.
+
+*lift* shifts *text* up by a length (down when negative), in em, pt or
+px -- the correction for a font that draws its glyphs off the baseline,
+which is a property of the font and so belongs in the klammer that names
+it: Noto Sans Egyptian Hieroglyphs floats its signs and wants about
+0.15em, NewGardinerOmni stands them on the baseline and wants none.
+Html and tex alike; the txt target has no vertical position.
 
 The change ends with *text*: nothing after it is affected.  Under the
 txt target a typeface cannot be expressed at all, so *text* is emitted
@@ -107,9 +122,19 @@ than a typeface -- xeCJK for the tex path), so this klammer errors with
 the list of available typefaces until one is installed with
 "kdesc --typeface install".  That is the honest behaviour: the klammer
 states what it needs and the store reports what it has.
-]#
 @@cjk.k text : Set *text* in a typeface that supports CJK @@
 @@cjk.html,tex,txt :: @typeface Noto Sans CJK SC | *text* @ @@
+]#
+
+# Only defining on Chinese style for now; could be parameterized.
+@@chinese.k text :scale.float 1 : Set *text* in a Chinese font @@
+@@chinese.html,tex,txt :: @typeface Noto Serif SC :scale *scale* | *text* @ @@
+
+# Egyptian hieroglyphs
+@@egyptian.k text :scale.float 1.75 : Set *text* in an Egyptian hieroglyph font @@
+@@egyptian.html,tex,txt :: @typeface NewGardinerOmni :scale *scale* :middle | *text* @ @@
+# @@egyptian.html,tex,txt :: @typeface Noto Sans Egyptian Hieroglyphs :scale *scale* :middle | *text* @ @@
+
 
 @@fraktur.k s : Set text *s* in Fraktur @@
 @@fraktur.tex :: \textfrak{*s*} @@