Update the look of the chatbar to be floating with the rich text controls on top and send buttons inline

src/libneochat/chattextitemhelper.h

@@ -172,6 +172,11 @@ public:
      */
     std::optional<int> cursorPosition() const;
 
+    /**
+     * @brief Return the rectangle where the cursor of the underlying text item is rendered.
+     */
+    QRect cursorRectangle() const;
+
     /**
      * @brief Set the cursor position of the underlying text item to the given value.
      */