feat: Human Input Node (#32060)

The frontend and backend implementation for the human input node.

Co-authored-by: twwu <twwu@dify.ai>
Co-authored-by: JzoNg <jzongcode@gmail.com>
Co-authored-by: yyh <92089059+lyzno1@users.noreply.github.com>
Co-authored-by: zhsama <torvalds@linux.do>

api/tests/unit_tests/controllers/service_api/app/test_workflow_fields.py

@@ -0,0 +1,25 @@
+from types import SimpleNamespace
+
+from controllers.service_api.app.workflow import WorkflowRunOutputsField, WorkflowRunStatusField
+from core.workflow.enums import WorkflowExecutionStatus
+
+
+def test_workflow_run_status_field_with_enum() -> None:
+    field = WorkflowRunStatusField()
+    obj = SimpleNamespace(status=WorkflowExecutionStatus.PAUSED)
+
+    assert field.output("status", obj) == "paused"
+
+
+def test_workflow_run_outputs_field_paused_returns_empty() -> None:
+    field = WorkflowRunOutputsField()
+    obj = SimpleNamespace(status=WorkflowExecutionStatus.PAUSED, outputs_dict={"foo": "bar"})
+
+    assert field.output("outputs", obj) == {}
+
+
+def test_workflow_run_outputs_field_running_returns_outputs() -> None:
+    field = WorkflowRunOutputsField()
+    obj = SimpleNamespace(status=WorkflowExecutionStatus.RUNNING, outputs_dict={"foo": "bar"})
+
+    assert field.output("outputs", obj) == {"foo": "bar"}