add usage template

python/src/main/resources/output_templates/usage.html

@@ -0,0 +1,27 @@
+<!--
+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.
+-->
+<h4>Usage</h4>
+<div>
+  Activate an environment (python interpreter will be restarted)
+  <pre>%python.conda activate [ENV NAME]</pre>
+</div>
+<div>
+  Deactivate
+  <pre>%python.conda deactivate</pre>
+</div>
+<div>
+    List the Conda environments
+    <pre>%python.conda</pre>
+</div>
+