Make table of contents slightly more granular

Time Series and geospatial have 4 sub resources, sequences has 2, so it makes more sense to group them like this

docs/source/assets.rst

@@ -0,0 +1,75 @@
+Assets
+======
+Retrieve an asset by id
+^^^^^^^^^^^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.retrieve
+
+Retrieve multiple assets by id
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.retrieve_multiple
+
+Retrieve an asset subtree
+^^^^^^^^^^^^^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.retrieve_subtree
+
+List assets
+^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.list
+
+Aggregate assets
+^^^^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.aggregate
+
+Aggregate Asset Count
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.aggregate_count
+
+Aggregate Asset Value Cardinality
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.aggregate_cardinality_values
+
+Aggregate Asset Property Cardinality
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.aggregate_cardinality_properties
+
+Aggregate Asset Unique Values
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.aggregate_unique_values
+
+Aggregate Asset Unique Properties
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.aggregate_unique_properties
+
+Search for assets
+^^^^^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.search
+
+Create assets
+^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.create
+
+Create asset hierarchy
+^^^^^^^^^^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.create_hierarchy
+
+Delete assets
+^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.delete
+
+Filter assets
+^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.filter
+
+Update assets
+^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.update
+
+Upsert assets
+^^^^^^^^^^^^^
+.. automethod:: cognite.client._api.assets.AssetsAPI.upsert
+
+Asset Data classes
+^^^^^^^^^^^^^^^^^^
+.. automodule:: cognite.client.data_classes.assets
+    :members:
+    :show-inheritance: