Fix #2547: Add TaskOutput and CrewOutput to public exports

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/imports_test.py

@@ -0,0 +1,15 @@
+"""Test that all public API classes are properly importable."""
+
+
+def test_task_output_import():
+    """Test that TaskOutput can be imported from crewai."""
+    from crewai import TaskOutput
+    
+    assert TaskOutput is not None
+    
+    
+def test_crew_output_import():
+    """Test that CrewOutput can be imported from crewai."""
+    from crewai import CrewOutput
+    
+    assert CrewOutput is not None