Surface python interface (#6370)

* Add python interface for importing surfaces with example.

ApplicationCode/GrpcInterface/Python/rips/PythonExamples/surface_import.py

@@ -0,0 +1,40 @@
+# Load ResInsight Processing Server Client Library
+import rips
+# Connect to ResInsight instance
+resinsight = rips.Instance.find()
+print("ResInsight version: " + resinsight.version_string())
+
+# Example code
+
+# get the project
+project = resinsight.project
+
+# get the topmost surface folder from the project
+surfacefolder = project.surface_folder()
+
+# list of surface files to load
+filenames = ["surface1.ts", "surface2.ts", "surface3.ts"]
+
+# Load the files into the top level
+for surffile in filenames:
+    surface = surfacefolder.import_surface(surffile)
+    if surface is None:
+        print("Could not import the surface " + surffile)
+
+# add a subfolder
+subfolder = surfacefolder.add_folder("ExampleFolder")
+
+# load the same surface multiple times using increasing depth offsets
+# store them in the new subfolder we just created
+for offset in range(0, 200, 20):
+    surface = subfolder.import_surface("mysurface.ts")
+    if surface:
+        surface.depth_offset = offset
+        surface.update()
+    else:
+        print("Could not import surface.")
+
+# get an existing subfolder
+existingfolder = project.surface_folder("ExistingFolder")
+if existingfolder is None:
+    print("Could not find the specified folder.")