Extend use statements and Data Accounts paths for fuzz snapshots

[lukacan]

Currently, once the accounts_snapshots.rs file is generated, users need to manually import the structures stored inside the Data Accounts. This PR addresses this issue by obtaining full paths (if possible) to the defined types, employing the same logic used for obtaining full paths to the Instruction input arguments for .program_client.

The Test generator has been updated to consolidate all extracted data into a single vector called programs_data, rather than using separate fields for IDL and data required for the fuzzer.

Additional minor updates include:

• Adding use crate::PROGRAM_ID, as it is often used within accounts_snapshots.rs and is available inside test_fuzz.rs.
• Implementing small updates to the outputs to enhance the user experience.

[Ikrk]

lgtm. good job. Just some minor comments... Also, we have to keep in mind, that the SPL data types and also the composite accounts types are not imported. So in these cases the user will still have to import it manually.