feat(state-viewer): list accounts with contracts (near#8371)

A state viewer command to list all accounts with contracts deployed.

So far it only shows the account names and the wasm size.
The intention is to extend it for more sophisticated filtering.

So far, the command finishes all four shards in 2 minutes on a
mainnet archival RocksDB.

tools/state-viewer/src/lib.rs

@@ -4,6 +4,8 @@ mod apply_chain_range;
 mod apply_chunk;
 pub mod cli;
 mod commands;
+mod contract_accounts;
+mod dump_state_parts;
 mod epoch_info;
 mod rocksdb_stats;
 mod state_dump;