select refactor: order by and basic agg kinda work

vendored/sqlite3-parser/src/parser/ast/fmt.rs

@@ -638,6 +638,7 @@ impl ToTokens for Expr {
             }
             Self::Id(id) => id.to_tokens(s),
             Self::Column { .. } => Ok(()),
+            Self::AggRef { .. } => Ok(()),
             Self::InList { lhs, not, rhs } => {
                 lhs.to_tokens(s)?;
                 if *not {

vendored/sqlite3-parser/src/parser/ast/mod.rs

@@ -338,6 +338,11 @@ pub enum Expr {
         /// is the column a primary key
         is_primary_key: bool,
     },
+    /// AggRef is a reference to a computed aggregate
+    AggRef {
+        /// index of the aggregate in the aggregates vector parsed from the query
+        index: usize,
+    },
     /// `IN`
     InList {
         /// expression