Split text section into blocks

The aim is to be able to use separate delegate for things like codeblocks and quotes so that they can be styled differently.

![image](/uploads/c813c0d1767f45df14cebe632e2ee10a/image.png)

src/eventhandler.h

@@ -137,6 +137,22 @@ public:
      */
     bool isHidden();
 
+    /**
+     * @brief The input format of the body in the message.
+     *
+     * I.e. if the message has only a body the format will be Qt::PlainText, if it
+     * has a formatted body it will be Qt::RichText.
+     */
+    static Qt::TextFormat messageBodyInputFormat(const Quotient::RoomMessageEvent &event);
+
+    /**
+     * @brief Output a string for the room message content without any formatting.
+     *
+     * This is the content of the formatted_body key if present or the body key if
+     * not.
+     */
+    static QString rawMessageBody(const Quotient::RoomMessageEvent &event);
+
     /**
      * @brief Output a string for the message content ready for display in a rich text field.
      *