BREAKING CHANGE(core): rebrand from smarts3 to smartstorage

- Package renamed from @push.rocks/smarts3 to @push.rocks/smartstorage
- Class: Smarts3 → SmartStorage, Interface: ISmarts3Config → ISmartStorageConfig
- Method: getS3Descriptor → getStorageDescriptor
- Rust binary: rusts3 → ruststorage
- Rust types: S3Error→StorageError, S3Action→StorageAction, S3Config→SmartStorageConfig, S3Server→StorageServer
- On-disk file extension: ._S3_object → ._storage_object
- Default credentials: S3RVER → STORAGE
- All internal S3 branding removed; AWS S3 protocol compatibility fully maintained

rust/src/main.rs

@@ -3,7 +3,7 @@ mod auth;
 mod config;
 mod management;
 mod policy;
-mod s3_error;
+mod error;
 mod server;
 mod storage;
 mod xml_response;
@@ -11,7 +11,7 @@ mod xml_response;
 use clap::Parser;
 
 #[derive(Parser)]
-#[command(name = "rusts3", about = "High-performance S3-compatible server")]
+#[command(name = "ruststorage", about = "High-performance S3-compatible storage server")]
 struct Cli {
     /// Run in management mode (IPC via stdin/stdout)
     #[arg(long)]
@@ -38,7 +38,7 @@ async fn main() -> anyhow::Result<()> {
 
         management::management_loop().await?;
     } else {
-        eprintln!("rusts3: use --management flag for IPC mode");
+        eprintln!("ruststorage: use --management flag for IPC mode");
         std::process::exit(1);
     }