Update Index and IndexInterface docstrings with RST formatting and code examples #224

Job	Run time
unit-tests / Type checking (3.10, true)	21s
create-project / create-project-job	45s
linting / lint	9s
unit-tests / Type checking (3.10, false)	20s
unit-tests / Unit grpc (3.10)	25s
unit-tests / Unit (3.10)	22s
integration-tests / grpc 3.10	3m 37s
integration-tests / rest 3.10 shard 1/10	3m 2s
integration-tests / rest 3.10 shard 5/10	2m 52s
integration-tests / rest 3.10 shard 4/10	3m 28s
integration-tests / rest 3.10 shard 2/10	2m 47s
integration-tests / rest_asyncio 3.10 shard 1/8	2m 49s
integration-tests / rest 3.10 shard 9/10	3m 56s
integration-tests / rest 3.10 shard 7/10	2m 37s
integration-tests / rest 3.10 shard 3/10	2m 55s
integration-tests / rest_asyncio 3.10 shard 5/8	1m 21s
integration-tests / rest_asyncio 3.10 shard 2/8	1m 43s
integration-tests / rest 3.10 shard 10/10	1m 22s
integration-tests / rest_asyncio 3.10 shard 7/8	2m 12s
integration-tests / rest_asyncio 3.10 shard 3/8	2m 4s
integration-tests / rest 3.10 shard 6/10	3m 29s
integration-tests / rest_asyncio 3.10 shard 6/8	2m 45s
integration-tests / rest_asyncio 3.10 shard 4/8	2m 27s
integration-tests / rest_asyncio 3.10 shard 8/8	2m 51s
integration-tests / rest 3.10 shard 8/10	2m 55s
cleanup-project / cleanup-project	34s
	54m 8s

Provide feedback