feat(schema): Add update_schema action to enable table schema updates

crates/iceberg/src/transaction/mod.rs

@@ -58,6 +58,7 @@ mod snapshot;
 mod sort_order;
 mod update_location;
 mod update_properties;
+mod update_schema;
 mod update_statistics;
 mod upgrade_format_version;
 
@@ -74,6 +75,7 @@ use crate::transaction::append::FastAppendAction;
 use crate::transaction::sort_order::ReplaceSortOrderAction;
 use crate::transaction::update_location::UpdateLocationAction;
 use crate::transaction::update_properties::UpdatePropertiesAction;
+use crate::transaction::update_schema::UpdateSchemaAction;
 use crate::transaction::update_statistics::UpdateStatisticsAction;
 use crate::transaction::upgrade_format_version::UpgradeFormatVersionAction;
 use crate::{Catalog, TableCommit, TableRequirement, TableUpdate};
@@ -136,6 +138,11 @@ impl Transaction {
         UpdatePropertiesAction::new()
     }
 
+    /// Creates an update schema action.
+    pub fn update_schema(&self) -> UpdateSchemaAction {
+        UpdateSchemaAction::new()
+    }
+
     /// Creates a fast append action.
     pub fn fast_append(&self) -> FastAppendAction {
         FastAppendAction::new()