Improve arg parsing

crates/pile-value/src/extract/item/sidecar.rs

@@ -23,12 +23,16 @@ impl SidecarExtractor {
 
 #[async_trait::async_trait]
 impl ObjectExtractor for SidecarExtractor {
-	async fn field(&self, name: &Label) -> Result<Option<PileValue>, std::io::Error> {
+	async fn field(
+		&self,
+		name: &Label,
+		args: Option<&str>,
+	) -> Result<Option<PileValue>, std::io::Error> {
 		match self
 			.output
 			.get_or_init(|| self.item.sidecar().map(TomlExtractor::new))
 		{
-			Some(x) => Ok(x.field(name).await?),
+			Some(x) => Ok(x.field(name, args).await?),
 			None => Ok(Some(PileValue::Null)),
 		}
 	}