Demos - Demo page for adding new elements in the document

[sebastian0107]

We need a demo page to demonstrate how to add elements to the document (ex. how to make a button that insert a new H1 line)

[adrian-moisa]

We have added a demo showcasing how to programatically add elements in the page.

Screen.Recording.2022-12-20.at.16.22.27.mov

[sebastian0107]

We choose to add this page to show all clients how we can insert new elements at the end of the delta document by using only existing methods from the controller. Because there is no insert method available, this operation can be achieved by using a replacement (replaceText() )for the last element of the document.