examples(rust): add podctl CLI (balance/transfer/committee/logs)
          #108
        
          
      
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This PR adds a minimal CLI
podctlunderexamples/rustas a bin target.Commands
Design notes
logsrequires a WebSocket RPC (ws:// or wss://). If HTTP is detected, the CLI prints a helpful hint and exits.Limitations (current)
eth_getLogsfallback.--format/--rpcflags yet.Follow-ups proposed
logs-http(one-shot via HTTP; non-verifiable) with--from-block/--to-block/--topic0.verify-receipt <txHash>using current committee.--rpc,--private-key,--format json|text|ndjson.--abi-fileor event signature.health,committee history.