[ADF-2559] Sidenav layout (#3119)

* First step of extraction

* Add sidenav-layout to demo-shell

* Fix some sidenav-layout styles

* Fix tests

* Add documentation

* Fix typescript transpiler's stomache

* Modify component's directive's interface

* Enrich documentation

* Another documentation enrichment

* Fix tests and mobile expanded issue

demo-shell/src/app/components/home/home.component.html

@@ -1,4 +1,4 @@
-<header class="adf-home-background adf-primary-background-color">
+<header class="adf-home-background">
     <div class="adf-home-section ad">
         <div class="adf-home-headline">
             <h1 class="mat-h1">ADF</h1>