[ADF-4152] Updated folder structure of core docs (#4415)

* [ADF-4152] Moved core library docs into subfolders

* [ADF-4152] Moved core library docs into subfolders

* [ADF-4152] Manual fixes to core doc file links

* [ADF-4152] Further automatic + manual link tidying

docs/core/models/ecm-user.model.md

@@ -0,0 +1,27 @@
+---
+Title: Ecm User model
+Added: v2.0.0
+Status: Active
+---
+
+# [Ecm User model](../../../lib/core/userinfo/models/ecm-user.model.ts "Defined in ecm-user.model.ts")
+
+Contains information about a Content Services user.
+
+## Details
+
+Instances of this class are returned by the methods of the
+[Ecm User service](../services/ecm-user.service.md). It implements the `Person`
+interface, which is defined in the
+[Alfresco JS API](https://github.com/Alfresco/alfresco-js-api/blob/master/src/alfresco-core-rest-api/docs/Person.md).
+
+Note that the Typescript class for this model is in active development;
+it is likely to change and so its properties are not listed here. For the
+latest version of the class, see the
+[source file](https://github.com/Alfresco/alfresco-ng2-components/blob/development/lib/core/userinfo/models/ecm-user.model.ts).
+
+## See also
+
+-   [Ecm user service](../services/ecm-user.service.md)
+-   [People content service](../services/people-content.service.md)
+-   [Bpm user model](bpm-user.model.md)