refactor(linkparser): take string views (#6715)

Reviewed-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/messages/MessageBuilder.cpp

@@ -1009,7 +1009,7 @@ void MessageBuilder::append(std::unique_ptr<MessageElement> element)
 }
 
 void MessageBuilder::addLink(const linkparser::Parsed &parsedLink,
-                             const QString &source)
+                             QStringView source)
 {
     QString lowercaseLinkString;
     QString origLink = parsedLink.link.toString();

src/messages/MessageBuilder.hpp

@@ -139,7 +139,7 @@ public:
     std::weak_ptr<const Message> weakOf();
 
     void append(std::unique_ptr<MessageElement> element);
-    void addLink(const linkparser::Parsed &parsedLink, const QString &source);
+    void addLink(const linkparser::Parsed &parsedLink, QStringView source);
 
     template <typename T, typename... Args>
     T *emplace(Args &&...args)