Feat:new component Loop (#11447)

### What problem does this PR solve?
issue:
#10427
change: 
new component Loop

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

agent/component/exit_loop.py

@@ -0,0 +1,32 @@
+#
+#  Copyright 2024 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+from abc import ABC
+from agent.component.base import ComponentBase, ComponentParamBase
+
+
+class ExitLoopParam(ComponentParamBase, ABC):
+    def check(self):
+        return True
+
+
+class ExitLoop(ComponentBase, ABC):
+    component_name = "ExitLoop"
+
+    def _invoke(self, **kwargs):
+        pass
+
+    def thoughts(self) -> str:
+        return ""