doc2tex: generate docs to Latex (#17997)

* `doc2tex`: generate docs to Latex

* address some comments

config/nimdoc.tex.cfg

@@ -8,22 +8,24 @@ split.item.toc = "20"
 # after this number of characters
 
 doc.section = """
-\chapter{$sectionTitle}\label{$sectionID}
-\begin{description}
+\rsthA{$sectionTitle}\label{$sectionID}
 $content
-\end{description}
 """
 
 doc.section.toc = ""
 # $sectionID $sectionTitleID $sectionTitle $content
 
 doc.item = """
-\item[\texttt{$header}\label{$itemID}]\mbox{~}\\*
+
+\phantomsection\addcontentsline{toc}{subsection}{$uniqueName}
+
+\begin{rstpre}
+$header
+\end{rstpre}
 $desc
 """
 
 doc.item.toc = ""
-#  \item $name\ref{$itemID}
 
 doc.toc = r"\tableofcontents \newpage"
 
@@ -38,6 +40,10 @@ $moduledesc
 $content
 """
 
+# $1 - number of listing in document, $2 - language (e.g. langNim), $3 - anchor
+doc.listing_start = "\\begin{rstpre}\n"
+doc.listing_end = "\n\\end{rstpre}\n"
+
 doc.file = """
 % This file was generated by Nim.
 % Generated: $date $time UTC