vim,zathura: Setup LaTeX file development

LaTeX files can now be automatically compiled in vim and jumping into
the relevant lines from PDF to code or the other way around is possible
too.
Add the LaTeX coc-language server as well.

Thanks to @AurelWeinhold

.config/zathura/zathurarc

@@ -16,3 +16,7 @@ set recolor-reverse-video true
 
 # Search while typing
 set incremental-search true
+
+# vimtex
+set synctex true
+set synctex-editor-command "nvr --remote +%{line} %{input}"