fix: directive 序言字符串按源序先发射且完成值参与收敛

crates/oxide_emit/src/expr/literal.rs

@@ -49,7 +49,7 @@ impl Emitter {
         Ok(r)
     }
 
-    fn emit_string_literal_expression(
+    pub(crate) fn emit_string_literal_expression(
         &self, s: &oxide_parser::StringLiteral, ctx: &mut CompileCtx,
     ) -> Result<u32, String> {
         let idx = ctx