Default page templates

[poliagos]

Describe the feature you'd like
Page templates is great, and i think it would very useful if a template could be set as default one for new pages in a book (book-level setting).

Describe the benefits this feature would bring to BookStack users
Simplify creation of pages with predifined structure. E.g. problem-solution articles, etc.

[cod3monk]

I would love this feature to be added, an intermediate solution (for my problem at hand) would be a create-page link that will auto insert a specified template.

Describe the benefits this feature would bring to BookStack users
I want to pass a link to a large crowd (of mostly non-techs) that will allow them to quickly create a page with a predefined structure. Having to explain how to insert a template significantly reduces the experience for them. Especially because it is not easy to explain in words the "Template Icon".

[ssddanbrown]

Thanks to @lennertdaniels in #3918, followed by some further changes in #4721, this functionality has now been added and will be part of the next feature release.

Thanks @NikolayPolyagoshko for the original request, and thanks @cod3monk for providing an intermediate solution, even if we didn't get round to implementing in the mean time.