Use consistent naming in the client Cardano database APIs

[jpraynaud]

Why

We need to align the usage of the function names in the client Cardano database APIs. In particular, we want to remove the usage of snapshot for the CardanoImmutableFilesFull signed entity type.

What

Deprecate current usage of snapshot for the CardanoImmutableFilesFull signed entity type.

How

• Deprecate legacy snapshot name for CardanoImmutableFilesFull signed entity type:
  • Create cardano_database() client in the library
  • Deprecate the snapshot() client in the library (becomes an alias of cardano_database())
  • Deprecate the get_snapshot and list_snasphots function in the WASM client
  • Create the list_cardano_database and get_cardano_database to replace them in the WASM client