refactor: extract hitl to provider pattern

* refactor: extract hitl to provider pattern

- add humaninputprovider protocol with setup_messages and handle_feedback
- move sync hitl logic from executor to synchuman inputprovider
- add _passthrough_exceptions extension point in agent/core.py
- create crewai.core.providers module for extensible components
- remove _ask_human_input from base_agent_executor_mixin

lib/crewai/tests/test_flow_human_input_integration.py

@@ -2,6 +2,7 @@ from unittest.mock import MagicMock, patch
 
 import pytest
 from crewai.events.event_listener import event_listener
+from crewai.core.providers.human_input import SyncHumanInputProvider
 
 
 class TestFlowHumanInputIntegration:
@@ -24,14 +25,9 @@ class TestFlowHumanInputIntegration:
     @patch("builtins.input", return_value="")
     def test_human_input_pauses_flow_updates(self, mock_input):
         """Test that human input pauses Flow status updates."""
-        from crewai.agents.agent_builder.base_agent_executor_mixin import (
-            CrewAgentExecutorMixin,
-        )
-
-        executor = CrewAgentExecutorMixin()
-        executor.crew = MagicMock()
-        executor.crew._train = False
-        executor._printer = MagicMock()
+        provider = SyncHumanInputProvider()
+        crew = MagicMock()
+        crew._train = False
 
         formatter = event_listener.formatter
 
@@ -39,7 +35,7 @@ class TestFlowHumanInputIntegration:
             patch.object(formatter, "pause_live_updates") as mock_pause,
             patch.object(formatter, "resume_live_updates") as mock_resume,
         ):
-            result = executor._ask_human_input("Test result")
+            result = provider._prompt_input(crew)
 
             mock_pause.assert_called_once()
             mock_resume.assert_called_once()
@@ -49,14 +45,9 @@ class TestFlowHumanInputIntegration:
     @patch("builtins.input", side_effect=["feedback", ""])
     def test_multiple_human_input_rounds(self, mock_input):
         """Test multiple rounds of human input with Flow status management."""
-        from crewai.agents.agent_builder.base_agent_executor_mixin import (
-            CrewAgentExecutorMixin,
-        )
-
-        executor = CrewAgentExecutorMixin()
-        executor.crew = MagicMock()
-        executor.crew._train = False
-        executor._printer = MagicMock()
+        provider = SyncHumanInputProvider()
+        crew = MagicMock()
+        crew._train = False
 
         formatter = event_listener.formatter
 
@@ -75,10 +66,10 @@ class TestFlowHumanInputIntegration:
                 formatter, "resume_live_updates", side_effect=track_resume
             ),
         ):
-            result1 = executor._ask_human_input("Test result 1")
+            result1 = provider._prompt_input(crew)
             assert result1 == "feedback"
 
-            result2 = executor._ask_human_input("Test result 2")
+            result2 = provider._prompt_input(crew)
             assert result2 == ""
 
             assert len(pause_calls) == 2
@@ -103,14 +94,9 @@ class TestFlowHumanInputIntegration:
 
     def test_pause_resume_exception_handling(self):
         """Test that resume is called even if exception occurs during human input."""
-        from crewai.agents.agent_builder.base_agent_executor_mixin import (
-            CrewAgentExecutorMixin,
-        )
-
-        executor = CrewAgentExecutorMixin()
-        executor.crew = MagicMock()
-        executor.crew._train = False
-        executor._printer = MagicMock()
+        provider = SyncHumanInputProvider()
+        crew = MagicMock()
+        crew._train = False
 
         formatter = event_listener.formatter
 
@@ -122,21 +108,16 @@ class TestFlowHumanInputIntegration:
             ),
         ):
             with pytest.raises(KeyboardInterrupt):
-                executor._ask_human_input("Test result")
+                provider._prompt_input(crew)
 
             mock_pause.assert_called_once()
             mock_resume.assert_called_once()
 
     def test_training_mode_human_input(self):
         """Test human input in training mode."""
-        from crewai.agents.agent_builder.base_agent_executor_mixin import (
-            CrewAgentExecutorMixin,
-        )
-
-        executor = CrewAgentExecutorMixin()
-        executor.crew = MagicMock()
-        executor.crew._train = True
-        executor._printer = MagicMock()
+        provider = SyncHumanInputProvider()
+        crew = MagicMock()
+        crew._train = True
 
         formatter = event_listener.formatter
 
@@ -146,7 +127,7 @@ class TestFlowHumanInputIntegration:
             patch.object(formatter.console, "print") as mock_console_print,
             patch("builtins.input", return_value="training feedback"),
         ):
-            result = executor._ask_human_input("Test result")
+            result = provider._prompt_input(crew)
 
             mock_pause.assert_called_once()
             mock_resume.assert_called_once()
@@ -161,4 +142,4 @@ class TestFlowHumanInputIntegration:
                 for call in call_args
                 if call[0]
             )
-            assert training_panel_found
+            assert training_panel_found