[3.x] Readonly modules

[haringsrob]

Summary

It can be useful for modules like form submissions, order checkouts etc to have readonly modules

Describe the solution you'd like

We can provide a standard set of components + "view builder" to allow developers to create readonly pages for modules.

Detail url: http://twill3x.test/admin/pages/1/details
Edit url: http://twill3x.test/admin/pages/1/edit

• Add a "getDetailPage" method to the controller. This can return a "view" or a "Render object (name tbd)"
• The table builder can show the detail page if there is one setup

Add components for:

• Key->value displays
• Simple text
• Headings
• Columns