A consolidated section about building CP pages

[jcogs-design]

Suggested Change
Add a page within the Add-on development section that provides a consolidated best-practice view of how CP pages are generated and constructed.

Reasoning
Particularly following the introduction of the new more accessible UI in EE6 the CP is for many sites a critical domain. EE has long provided the ability to modify / add to the pages within the CP, and there are many methods provided by EE that are related to doing this within the documentation (e.g. the series of CP/Thing Service entries under Services).

However the documentation does not provide a consolidated description of or guide to the steps involved in either creating or modifying a CP page. Rather the expectation is that Developers construct their own understanding from the snippets spread through the documentation. It would be easier if there was (at the very least) a simple index page that listed links to relevant sections of the documentation.

The introduction to the Control Panel File section of the Modules entry comes close to providing some of these elements, but a) it is buried in another page, and b) provides at best only a partial view of what is involved in constructing a CP page.