Update docs

[THenry14]

Feature Request

eg https://starknetpy.readthedocs.io/en/latest/api/full_node_client.html#starknet_py.net.full_node_client.FullNodeClient.__init__ stated there is net param, which is not the case

[ddoktorski]

In the scope of this issue also check that code examples are correctly displayed in the API docs. For example test_execute needs to be renamed to test_execute_v1 and docs-start and docs-end should use a name execute_v1 instead of execute