Add content to simulation project

Author: ggiraldof

tutorial/create_project.rst

@@ -1,7 +1,83 @@
-Creating Projects
-=================
+Simulation Project
+==================
 
 To Do:
 
 * Explain what a simulation project is and what it contains
 * How to create a simulation project with the SDK
+
+A simulation project is a container  for the elements needed to setup a simulation, the two most
+important of them being the CAD geometry and the simulation or physics setup. We can visualize
+the hierarchy with a tree structure:
+
+.. code-block::
+
+    - Simulation project
+    |
+    |- Geometries
+    | |
+    | |- CAD 1
+    | |- CAD 2
+    |
+    |- Simulations
+      |
+      |- Simulation 1
+      |- Simulation 2
+
+
+Eeach simulation is linked to one geometry, and each simulation setup contains the physics definition.
+More details to follow in the specific steps.
+
+In order to create and manipulate simulation projects, the SimScale SDK provides a Projects API client:
+
+.. code-block:: python
+
+    import simscale_sdk as sim
+
+    projects_api = sim.ProjectsApi(api_client)
+
+
+.. code-block:: csharp
+
+    ...
+
+
+We can see that the projects api object is initialized with the ``api_client``, which we previously
+initialized with our Api key and host URL.
+
+The project data is hosted in a ``Project`` object, which is then included as the argument of the
+actual Api call to create the project:
+
+.. code-block:: python
+
+    import simscale_sdk as sim
+
+    project_data = sim.Project(
+        name="My first simulation project",
+        description="Created via SDK",
+        measurement_system="SI"
+    )
+
+    project = projects_api.create_project(project_data)
+
+    project_id = project.project_id
+
+    print(f"{project_id=}")
+
+
+.. code-block:: csharp
+
+    ...
+
+
+You can see that the ``ProjectsApi.create_project`` method returns a ``Project`` object containing
+the data of our original object, plus some additional data added after the project is created in the platform.
+For instance, the ``project_id`` is a unique identification string for our newly created project.
+
+The ``ProjectsApi`` object has many other useful methods to deal with simulations project data, such as:
+
+* To get the data for an existing project ``ProjectsApi.get_project(project_id)``
+* To update the data for an existing proejct ``ProjectsApi.update_project(project_id, project_data)``
+
+More details on the Projects Api can be found in the 
+`documentation <https://simscalegmbh.github.io/simscale-python-sdk/simscale_sdk.api.html#module-simscale_sdk.api.projects_api>`_