make view metadata serde public

Author: JanKaul

iceberg-rust-spec/src/spec/table_metadata.rs

@@ -33,6 +33,8 @@ pub static MAIN_BRANCH: &str = "main";
 static DEFAULT_SORT_ORDER_ID: i32 = 0;
 static DEFAULT_SPEC_ID: i32 = 0;
 
+pub use _serde::{TableMetadataV1, TableMetadataV2};
+
 use _serde::TableMetadataEnum;
 
 #[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone, Default, Builder)]
@@ -254,7 +256,7 @@ impl str::FromStr for TableMetadata {
     }
 }
 
-mod _serde {
+pub mod _serde {
     use std::collections::HashMap;
 
     use itertools::Itertools;

iceberg-rust-spec/src/spec/view_metadata.rs

@@ -19,6 +19,8 @@ use crate::error::Error;
 
 use super::schema::{Schema, DEFAULT_SCHEMA_ID};
 
+pub use _serde::ViewMetadataV1;
+
 use _serde::ViewMetadataEnum;
 
 /// Prefix used to denote branch references in the view properties