Add further helpful contextual links for site builders (eg. entity field manager)

Problem/Motivation

Sometimes it is a horrible mess to navigate to an entity configuration page, especially if you have many different entity types like nodes, paragraphs, taxonomy, commerce product, commerce line item, commerce .. whatever.

Steps to reproduce

Proposed resolution

Add links like:
- Entity Configuration (/admin/structure/types/manage/FOO)
- Entity Fields (/admin/structure/types/manage/FOO/fields)
- Entity Display (/admin/structure/types/manage/FOO/display)
- Entity Form (/admin/structure/types/manage/FOO/form-display)
- ...?

Remaining tasks

User interface changes

API changes

Data model changes