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/base.py

@@ -166,7 +166,7 @@ class ToolBase(ComponentBase):
                 "count": 1,
                 "url": url
             })
-        self._canvas.add_refernce(chunks, aggs)
+        self._canvas.add_reference(chunks, aggs)
         self.set_output("formalized_content", "\n".join(kb_prompt({"chunks": chunks, "doc_aggs": aggs}, 200000, True)))
 
     def thoughts(self) -> str: