feat: Add check for whether appendOnly table feature is supported or enabled

kernel/src/table_configuration.rs

@@ -192,6 +192,26 @@ impl TableConfiguration {
                 .enable_deletion_vectors
                 .unwrap_or(false)
     }
+
+    /// Returns `true` if the table supports the appendOnly table feature. To support this feature:
+    /// - The table must have a writer version between 2 and 7 (inclusive)
+    /// - If the table is on writer version 7, it must have the [`WriterFeatures::AppendOnly`]
+    ///   writer feature.
+    #[allow(unused)]
+    #[cfg_attr(feature = "developer-visibility", visibility::make(pub))]
+    pub(crate) fn is_append_only_supported(&self) -> bool {
+        let protocol = &self.protocol;
+        match protocol.min_writer_version() {
+            7 if protocol.has_writer_feature(&WriterFeatures::AppendOnly) => true,
+            version => (2..=6).contains(&version),
+        }
+    }
+
+    #[allow(unused)]
+    #[cfg_attr(feature = "developer-visibility", visibility::make(pub))]
+    pub(crate) fn is_append_only_enabled(&self) -> bool {
+        self.is_append_only_supported() && self.table_properties.append_only.unwrap_or(false)
+    }
 }
 
 #[cfg(test)]