Fix the types parser regex

[synw]

We have an option to declare and parse the types (undocumented yet). The principle: the user declares his type links in a public/doc/type_urls.json file like here. This file is used to parse the docstrings to search for types and replace them by a regex using this function

function linkType(data, typename, typelink) {
  const regex = new RegExp(`(?<!<\\/a>|'\\)")(\\b${typename}\\b)`, 'g');
  const replacement = `<a href="javascript:openLink(\'${typelink}\')">${typename}</a>`;
  return data.replace(regex, replacement);
}

The regex is currently broken: it works on the first pass and transforms the found types into links correctly. But on the second pass it does not detect correctly the already linked types and relink them, breaking the html

[Edit]: to parse the types run the docnav command with a -t flag