Alias page example in bakery demo content

[thibaudcolas]

So we can better understand and work on alias pages support, for example for Different styling for page aliases compared to normal pages in page tree. #6916.

To work on this:

• Need to understand what alias pages are
• Then make one in demo content
• Then export the fixtures with this page added (and nothing else)

[udaydevs]

Please assign me this issue @thibaudcolas

[thibaudcolas]

Thanks for your interest! We don't assign issues outside the core team. Please give our first contribution guide a read. The short version - always check the issue carefully, especially for any signs of an existing PR. If there's nothing, and no one else mentioned they are working on it, say you’re taking on the issue in a comment and go for it.

[xevrion]

Hi! I’ve been setting up Wagtail locally and would like to take this on.

I’ll work on understanding alias pages, add an example to the bakerydemo content, and export fixtures with just this change.

I’ll open a PR once it’s ready.