chore(pandoc): add templates

pandoc/templates/default.rst

@@ -0,0 +1,48 @@
+$if(title)$
+$title$
+
+$endif$
+$for(author)$
+:Author: $author$
+$endfor$
+$if(date)$
+:Date:   $date$
+$endif$
+$if(author)$
+
+$else$
+$if(date)$
+
+$endif$
+$endif$
+$if(math)$
+.. role:: math(raw)
+   :format: html latex
+..
+
+$endif$
+$if(rawtex)$
+.. role:: raw-latex(raw)
+   :format: latex
+..
+
+$endif$
+$for(include-before)$
+$include-before$
+
+$endfor$
+$if(toc)$
+.. contents::
+   :depth: $toc-depth$
+..
+
+$endif$
+$for(header-includes)$
+$header-includes$
+
+$endfor$
+$body$
+$for(include-after)$
+
+$include-after$
+$endfor$