feat: Improve delete API with clear hard delete option

- Single clear way to hard delete: { hard: true }
- Removed confusing soft: false option
- Soft delete remains the default behavior
- Clean, intuitive API: delete() for soft, delete(id, { hard: true }) for hard
- All delete features working: soft, hard, cascade

dist/brainyData.d.ts

@@ -785,7 +785,7 @@ export declare class BrainyData<T = any> implements BrainyDataInterface<T> {
      */
     delete(id: string, options?: {
         service?: string;
-        soft?: boolean;
+        hard?: boolean;
         cascade?: boolean;
         force?: boolean;
     }): Promise<boolean>;