[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

lib/core/sidenav-layout/directives/sidenav-layout-navigation.directive.ts

@@ -0,0 +1,26 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { ContentChild, Directive, TemplateRef } from '@angular/core';
+
+@Directive({
+    selector: 'adf-sidenav-layout-navigation'
+})
+export class SidenavLayoutNavigationDirective {
+    @ContentChild(TemplateRef)
+    public template: TemplateRef<any>;
+}