Fix IRC colors not being applied correctly to NOTICE messages (#3383)

* Normalize NOTICE message parsing for IRC

Fixes #1782

* Add changelog entry

Co-authored-by: Felanbird <41973452+Felanbird@users.noreply.github.com>

src/providers/irc/IrcMessageBuilder.hpp

@@ -30,6 +30,12 @@ public:
                                const MessageParseArgs &_args, QString content,
                                bool isAction);
 
+    /**
+     * @brief used for global notice messages (i.e. notice messages without a channel as its target)
+     **/
+    explicit IrcMessageBuilder(const Communi::IrcNoticeMessage *_ircMessage,
+                               const MessageParseArgs &_args);
+
     MessagePtr build() override;
 
 private: