adding documemtation for graph api (Role)

docs/apis/http/graph/role.md

@@ -0,0 +1,38 @@
+---
+title: Role
+weight: 60
+geekdocRepo: https://github.com/owncloud/ocis
+geekdocEditPath: edit/master/docs/apis/http/graph
+geekdocFilePath: permissions.md
+---
+
+{{< toc >}}
+
+## Role API
+
+The Roles API is implementing a subset of the functionality of the
+[MS Graph Role Management](https://learn.microsoft.com/en-us/graph/api/resources/rolemanagement?view=graph-rest-1.0).
+
+## Role Management
+
+### List roleDefinitions `GET /v1beta1/roleManagement/permissions/roleDefinitions`
+
+https://owncloud.dev/libre-graph-api/#/roleManagement/ListPermissionRoleDefinitions
+
+### Get unifiedRoleDefinition `GET /drives/{drive-id}/items/{item-id}/permissions/{perm-id}`
+
+https://owncloud.dev/libre-graph-api/#/roleManagement/GetPermissionRoleDefinition
+
+## Role Assignment
+
+### Get appRoleAssignments of a user `GET /v1.0/users/{user-id}/appRoleAssignments`
+
+https://owncloud.dev/libre-graph-api/#/user.appRoleAssignment/user.ListAppRoleAssignments
+
+### Grant an appRoleAssignment to a user `POST /v1.0/users/{user-id}/appRoleAssignments`
+
+https://owncloud.dev/libre-graph-api/#/user.appRoleAssignment/user.CreateAppRoleAssignments
+
+### Delete the appRoleAssignment from a user `DELETE /v1.0/users/{user-id}/appRoleAssignments/{appRoleAssignment-id}`
+
+https://owncloud.dev/libre-graph-api/#/user.appRoleAssignment/user.DeleteAppRoleAssignments