feat(search): Set default dialect to 2 for Redis Search commands (#2895)

- The default dialect `DEFAULT_DIALECT`  is now set to '2'
- Automatically append DIALECT parameter to search commands when not explicitly specified

packages/search/lib/commands/EXPLAIN.ts

@@ -1,6 +1,7 @@
 import { CommandParser } from '@redis/client/dist/lib/client/parser';
 import { RedisArgument, SimpleStringReply, Command } from '@redis/client/dist/lib/RESP/types';
 import { FtSearchParams, parseParamsArgument } from './SEARCH';
+import { DEFAULT_DIALECT } from '../dialect/default';
 
 export interface FtExplainOptions {
   PARAMS?: FtSearchParams;
@@ -22,6 +23,8 @@ export default {
 
     if (options?.DIALECT) {
       parser.push('DIALECT', options.DIALECT.toString());
+    } else {
+      parser.push('DIALECT', DEFAULT_DIALECT);
     }
   },
   transformReply: undefined as unknown as () => SimpleStringReply