Implement Tours in Extension

[erenfn]

Like hints we should implement tours in our extension. Currently, for hints we just click on the element to see the target element name. For tours we should click on elements and as we click on them they should be added to a list. The list can look similar to this design:

• It should enable drag and drop to change order
• Delete button should work
• When clicked on the list item, and then clicked on another element in the page, that list item should be edited -in that case we shouldn't add a new element to the list
• You can fork from onboard-extention branch

We will then send this list to our create tours page and parse it there. But we can do this in another task.

You can ask @swoopertr how to run the extension