Fix bugs for agent/tools. (#9930)

### What problem does this PR solve?
1 Fix typos
2 Fix agent/tools/crawler.py return bug.
3 Fix agent/tools/deepl.py  component_name  bug.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] Refactoring
- [x] Performance Improvement

Signed-off-by: zhanluxianshen <zhanluxianshen@163.com>

agent/tools/retrieval.py

@@ -163,7 +163,7 @@ class Retrieval(ToolBase, ABC):
             self.set_output("formalized_content", self._param.empty_response)
             return
 
-        self._canvas.add_refernce(kbinfos["chunks"], kbinfos["doc_aggs"])
+        self._canvas.add_reference(kbinfos["chunks"], kbinfos["doc_aggs"])
         form_cnt = "\n".join(kb_prompt(kbinfos, 200000, True))
         self.set_output("formalized_content", form_cnt)
         return form_cnt