Parser: Seperate parseDynamcis(), fix headline extraction with tags inside them

iparser.h

@@ -23,6 +23,10 @@ class IParser
 	}
 	virtual std::string parse(const PageDao &pagedao, UrlProvider &provider, const std::string &content,
 							  const std::function<std::string(std::string_view, std::string_view)> &callback) const = 0;
+
+	virtual std::string parseDynamics(
+		const std::string &content,
+		const std::function<std::string(std::string_view, std::string_view)> &callback) const = 0;
 	virtual std::vector<std::string> extractCategories(const std::string &content) const = 0;
 
 	virtual ~IParser(){};