feat: add retryable property for Error (#1383)

## Which issue does this PR close?

This PR is the first part of #964. 

## What changes are included in this PR?



Before we support retryable process, this PR add retryable property for
Error.

## Are these changes tested?


Co-authored-by: ZENOTME <st810918843@gmail.com>

Author: ZENOTME

crates/catalog/rest/src/catalog.rs

@@ -770,7 +770,8 @@ impl Catalog for RestCatalog {
                 return Err(Error::new(
                     ErrorKind::Unexpected,
                     "CommitFailedException, one or more requirements failed. The client may retry.",
-                ));
+                )
+                .with_retryable(true));
             }
             StatusCode::INTERNAL_SERVER_ERROR => {
                 return Err(Error::new(

crates/iceberg/src/error.rs

@@ -134,6 +134,8 @@ pub struct Error {
 
     source: Option<anyhow::Error>,
     backtrace: Backtrace,
+
+    retryable: bool,
 }
 
 impl Display for Error {
@@ -225,9 +227,17 @@ impl Error {
             // `Backtrace::capture()` will check if backtrace has been enabled
             // internally. It's zero cost if backtrace is disabled.
             backtrace: Backtrace::capture(),
+
+            retryable: false,
         }
     }
 
+    /// Set retryable of the error.
+    pub fn with_retryable(mut self, retryable: bool) -> Self {
+        self.retryable = retryable;
+        self
+    }
+
     /// Add more context in error.
     pub fn with_context(mut self, key: &'static str, value: impl Into<String>) -> Self {
         self.context.push((key, value.into()));