新增了一个 写入 Word 文档（.docx） 的工具模块。

该工具能够将生成的报告内容以 .docx 格式自动写出到本地或指定路径，方便用户直接获取可编辑的报告文件。
新增了 word_writer 工具文件，用于将文本内容导出为 Word 文档。

PS:
我是第一次提交 PR，如果有任何不合适或不规范的地方，请多多指正！
我会积极修改并学习改进，非常感谢你的时间与帮助!

tests/test_agentuniverse/unit/agent/action/tool/test_write_word_tool.py

@@ -0,0 +1,89 @@
+import os
+import json
+import tempfile
+import unittest
+from agentuniverse.agent.action.tool.common_tool.write_word_tool import WriteWordDocumentTool
+
+
+class WriteWordDocumentToolTest(unittest.TestCase):
+    def setUp(self):
+        self.tool = WriteWordDocumentTool()
+        self.temp_dir = tempfile.mkdtemp()
+
+    def tearDown(self):
+        for root, dirs, files in os.walk(self.temp_dir, topdown=False):
+            for name in files:
+                os.unlink(os.path.join(root, name))
+            for name in dirs:
+                os.rmdir(os.path.join(root, name))
+        os.rmdir(self.temp_dir)
+
+    def test_write_new_word_file(self):
+        file_path = os.path.join(self.temp_dir, "test_new.docx")
+        content = "***This is a test paragraph.***"
+
+        result_json = self.tool.execute(file_path=file_path, content=content, append=False)
+        result = json.loads(result_json)
+
+        self.assertEqual(result["status"], "success")
+        self.assertEqual(result["file_path"], file_path)
+        self.assertTrue(os.path.exists(file_path))
+
+    def test_append_to_word_file(self):
+        file_path = os.path.join(self.temp_dir, "test_append.docx")
+
+        initial_content = "Initial paragraph."
+        self.tool.execute(file_path=file_path, content=initial_content, append=False)
+
+        append_content = "Appended paragraph."
+        result_json = self.tool.execute(file_path=file_path, content=append_content, append=True)
+        result = json.loads(result_json)
+
+        self.assertEqual(result["status"], "success")
+        self.assertEqual(result["append_mode"], True)
+
+    def test_invalid_file_extension(self):
+        file_path = os.path.join(self.temp_dir, "invalid_file.txt")
+        content = "This should fail."
+
+        result_json = self.tool.execute(file_path=file_path, content=content, append=False)
+        result = json.loads(result_json)
+
+        self.assertEqual(result["status"], "error")
+        self.assertIn("The target file must have a .docx extension.", result["error"])
+
+    def test_create_directory_structure(self):
+        file_path = os.path.join(self.temp_dir, "nested/dir/structure/test.docx")
+        content = "Test content in nested directory."
+
+        result_json = self.tool.execute(file_path=file_path, content=content, append=False)
+        result = json.loads(result_json)
+
+        self.assertEqual(result["status"], "success")
+        self.assertTrue(os.path.exists(file_path))
+        self.assertTrue(os.path.isdir(os.path.join(self.temp_dir, "nested/dir/structure")))
+
+    def test_missing_dependency(self):
+        original_import = __import__
+
+        def mock_import(name, *args):
+            if name == "docx":
+                raise ImportError("No module named 'docx'")
+            return original_import(name, *args)
+
+        try:
+            __builtins__["__import__"] = mock_import
+            file_path = os.path.join(self.temp_dir, "test_missing_dependency.docx")
+            content = "This should fail due to missing dependency."
+
+            result_json = self.tool.execute(file_path=file_path, content=content, append=False)
+            result = json.loads(result_json)
+
+            self.assertEqual(result["status"], "error")
+            self.assertIn("python-docx is required to write Word documents", result["error"])
+        finally:
+            __builtins__["__import__"] = original_import
+
+
+if __name__ == "__main__":
+    unittest.main()