Split BlenderBIM and other docs to not overwhelm users. Use Furo theme for Sphinx.

src/blenderbim/docs/index.rst

@@ -1,26 +1,25 @@
-IfcOpenShell Documentation
-==========================
+Let's get started
+=================
+
+The BlenderBIM Add-on lets you analyse, create, and modify OpenBIM with Blender. 
 
 .. toctree::
+   :hidden:
    :maxdepth: 1
-   :caption: Contents:
+   :caption: For users:
 
-   ifcopenshell
-   ifcopenshell-python
-   ifcconvert
-   blenderbim
-   bimtester
-   ifcdiff
-   ifcclash
-   ifccobie
-   ifcmax
-   ifcsverchok
-   bimserver-plugin
+   users/installation
+   users/exploring_an_ifc_model
+   users/creating_your_first_ifc
 
+.. toctree::
+   :hidden:
+   :maxdepth: 1
+   :caption: For developers:
 
-Indices and tables
-==================
-
-* :ref:`genindex`
-* :ref:`modindex`
-* :ref:`search`
+   devs/installation
+   devs/hello_world
+   devs/running_tests
+   devs/undo_system
+   devs/ux_guidelines
+   devs/georeferencing