add the Czech Markup module

MarkupNP marks s, clit and prep, since in Czech these are alternative
surface forms of a pronoun chosen by context, as in MarkupRomance.
The nominative clitic is left alone: it is the pro-drop subject, empty
for every personal pronoun, so marking it up gave "<b> </b> je starý".

Inherit MarkupCze in LangCze, as LangFin does; stringMark is excluded
because abstract Lang already excludes it.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/czech/LangCze.gf

@@ -1,10 +1,11 @@
 --# -path=.:../abstract:../common:../api
 
-concrete LangCze of Lang = 
+concrete LangCze of Lang =
   GrammarCze,
   LexiconCze
 --  ,ConstructionCze
 --  ,DocumentationCze --# notpresent
+  ,MarkupCze - [stringMark]
   ** {
 
 }

src/czech/MarkupCze.gf

@@ -0,0 +1,27 @@
+--# -path=.:../abstract:../common
+
+concrete MarkupCze of Markup = CatCze, MarkHTMLX ** open ResCze in {
+
+lin
+  MarkupCN   m cn  = cn ** {s = \\n,c   => appMark m (cn.s ! n ! c)} ;
+
+  -- s, clit and prep are alternative surface forms, so each is marked;
+  -- but clit ! Nom is the pro-drop subject, empty for every pronoun,
+  -- and marking it up would leave the tags around nothing
+  MarkupNP   m np  = np ** {
+    s    = \\c => appMark m (np.s ! c) ;
+    clit = \\c => case c of {
+      Nom => np.clit ! Nom ;
+      _   => appMark m (np.clit ! c)
+      } ;
+    prep = \\c => appMark m (np.prep ! c)
+    } ;
+
+  MarkupAP   m ap  = ap ** {s = \\g,n,c => appMark m (ap.s ! g ! n ! c)} ;
+  MarkupAdv  m adv =       {s =            appMark m adv.s} ;
+  MarkupS    m s   =       {s =            appMark m s.s} ;
+  MarkupUtt  m utt =       {s =            appMark m utt.s} ;
+  MarkupPhr  m phr =       {s =            appMark m phr.s} ;
+  MarkupText m txt =       {s =            appMark m txt.s} ;
+
+}