[docs] User tutorial (#8459)

* added user tutorial and rearranged docs hierarchy

* added license header, renamed admin tutorial file

* fixed image url issue

* Fix spelling

* Tweaks to text based on feedback

* guilabel and menu test

* added guilabel and upload csv section

* tidy up of rst formatting

docs/tutorials.rst

@@ -0,0 +1,25 @@
+..  Licensed to the Apache Software Foundation (ASF) under one
+    or more contributor license agreements.  See the NOTICE file
+    distributed with this work for additional information
+    regarding copyright ownership.  The ASF licenses this file
+    to you 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.
+
+Tutorials
+---------
+
+.. toctree::
+    :maxdepth: 2
+
+    admintutorial
+    usertutorial