Update README and generated_classes to recommend lowercase enum value…

…s and change USERGROUP enum to uppercase

README.MD

@@ -366,11 +366,12 @@ await supabase.books.delete().eq(Books.c_id, 1);
 
 - You need to specify your enums on supadart.yaml config file
 - Enum `names` are converted to `UPPERCASE` to follow dart enum naming conventions
-- Enum `values` are converted to `LOWERCASE` to follow dart enum naming conventions
+- Optional: We recommend defining the enum values as lowercase to follow dart enum naming conventions
 
 Assuming the following schema
 
 ```sql
+-- We recommend defining the enum values as lowercase to follow dart enum naming conventions
 CREATE TYPE mood AS ENUM ('happy', 'sad', 'neutral', 'excited', 'angry');
 CREATE TABLE enum_types (
     id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

cli/test/models/generated_classes.dart

@@ -59,7 +59,7 @@ extension SupadartStorageClient on SupabaseStorageClient {}
 // Enums
 enum MOOD { happy, sad, neutral, excited, angry }
 
-enum USERGROUP { users, admin, moderator }
+enum USERGROUP { USERS, ADMIN, MODERATOR }
 
 // Utils
 extension DurationFromString on Duration {