add addscores to aggregate search command (v5) (#2818)

Author: sjpotter

packages/search/lib/commands/AGGREGATE.spec.ts

@@ -20,6 +20,13 @@ describe('AGGREGATE', () => {
       );
     });
 
+    it('with ADDSCORES', () => {
+      assert.deepEqual(
+        AGGREGATE.transformArguments('index', '*', { ADDSCORES: true }),
+        ['FT.AGGREGATE', 'index', '*', 'ADDSCORES']
+      );
+    });  
+
     describe('with LOAD', () => {
       describe('single', () => {
         describe('without alias', () => {

packages/search/lib/commands/AGGREGATE.ts

@@ -118,6 +118,7 @@ interface FilterStep extends AggregateStep<FT_AGGREGATE_STEPS['FILTER']> {
 
 export interface FtAggregateOptions {
   VERBATIM?: boolean;
+  ADDSCORES?: boolean;
   LOAD?: LoadField | Array<LoadField>;
   TIMEOUT?: number;
   STEPS?: Array<GroupByStep | SortStep | ApplyStep | LimitStep | FilterStep>;
@@ -135,6 +136,10 @@ export default {
       args.push('VERBATIM');
     }
 
+    if (options?.ADDSCORES) {
+      args.push('ADDSCORES');
+    }  
+
     if (options?.LOAD) {
       const length = args.push('LOAD', '');