Refactor URLs and Names of Project Wiki related pages

A possible naming structure could be the following:

• Every word within the page title sould be in uppercase (Add Project Wiki Entity Content)
• Menu names should be the same as page titles just shortened (Not: Project Wiki Entity; But: Project Wiki Entity Content)
• URLs and Menu locations should simply match up starting with /admin/

What do you think?

I will change this now to the naming system that I have proposed above.

Done with the refactoring! If this system does not fit our current setup, please let me know in the review!

Thanks for the cleanup and pointing out these @LRWebks! :)

LGTM in large parts already. I'll assign this to me for further review.
I'm not sure about some technical details yet, of which I think Drupal will auto-generate them and I'm not totally sure about the URL and menu positions. We need to discuss that in the team! Background: "Content" would be the right parent menu item for nearly every custom entity, but the Wiki is not a "Project / Website content". It's something dedicated to the admin area and help. So I'd tend to place it all in admin/help/ ... for the list and creation of wiki entities.

Back to work then!

Back to review!

Needs a rebase. Also, a test fails!

Now that much has changed with the module and the routing, I think it is best if we postpone this until the very end, where we can take a final look at the routing in here. If this is needed sooner, we could always move this up in the list again.