docs: adding tutorial 1

docs/tutorials/common/grpc.md

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+## gRPC Python Scripts
+
+You can also run the same steps above, using the provided gRPC script versions of scenarios.
+Below are the steps to run and join one of these scenario, then you can continue with
+the remaining steps of a given section.
+
+1. Make sure the CORE daemon is running a terminal, if not already
+    ``` shell
+    sudop core-daemon
+    ```
+2. From another terminal run the tutorial python script, which will create a session to join
+    ``` shell
+    /opt/core/venv/bin/python scenario.py
+    ```
+3. In another terminal run the CORE GUI
+    ``` shell
+    core-gui
+    ```
+4. You will be presented with sessions to join, select the one created by the script
+   <p align="center">
+     <img src="images/tutorial-common/running-join.png" width="75%">
+   </p>