doc: add Feature Store methods docs (aws#2241)

Author: jkroll-aws

doc/api/prep_data/feature_store.rst

@@ -5,39 +5,70 @@ Feature group
 *************
 
 .. autoclass:: sagemaker.feature_store.feature_group.FeatureGroup
+    :members:
+    :exclude-members: load_feature_definitions
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.feature_group.AthenaQuery
+    :members:
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.feature_group.IngestionManagerPandas
+    :members:
+    :show-inheritance:
 
 
 Feature definition
 ******************
 
 .. autoclass:: sagemaker.feature_store.feature_definition.FeatureDefinition
+    :members:
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.feature_definition.FractionalFeatureDefinition
+    :members:
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.feature_definition.IntegralFeatureDefinition
+    :members:
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.feature_definition.StringFeatureDefinition
+    :members:
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.feature_definition.FeatureTypeEnum
+    :members:
+    :show-inheritance:
 
 
 Inputs
 ******
 
 .. autoclass:: sagemaker.feature_store.inputs.Config
+    :members:
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.inputs.DataCatalogConfig
+    :members:
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.inputs.OfflineStoreConfig
+    :members:
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.inputs.OnlineStoreConfig
+    :members:
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.inputs.OnlineStoreSecurityConfig
+    :members:
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.inputs.S3StorageConfig
+    :members:
+    :show-inheritance:
 
 .. autoclass:: sagemaker.feature_store.inputs.FeatureValue
+    :members:
+    :show-inheritance: