CLI fetches the whole account storage unnecessarily

Currently, on the CLI show account command, we fetch the whole account details. The CLI displays the whole vault but not the storage entries. We could either:
- Avoid fetching the storage. This would only use the `GetAccount` and `SyncAccountVault` endpoints.
- Display the full storage info. For this, I think we should add a subcommand / flag to opt-in into the full vault and full storage display.

Context: https://github.com/0xMiden/miden-client/pull/2158#discussion_r3250227466

Look at the CLI show account command code, likely in a cli/ or src/cli module. Identify where it fetches account details and calls GetAccount and SyncAccountVault endpoints. The goal is to modify the fetch logic to optionally skip storage data or add a flag/subcommand for full display. Check the linked PR discussion for more context on the current implementation.

索引モデルが issue の本文から書いたものです。