Sync v2.0 version of code to github repo

fastdeploy/model_executor/layers/attention/ops/append_attention.py

@@ -14,10 +14,16 @@
 # limitations under the License.
 """
 
-import paddle
 from typing import Optional
+
+import paddle
+
 from fastdeploy.platforms import current_platform
 
+if current_platform.is_cuda():
+    from fastdeploy.model_executor.ops.gpu import \
+        append_attention as append_attention_gpu
+
 
 def append_attention(
     qkv: paddle.Tensor,
@@ -68,14 +74,12 @@ def append_attention(
     speculate_max_draft_token_num: int = 1,
     causal: bool = True,
     speculate_decoder: bool = False,
-):
+) -> paddle.Tensor:
     """
-    Args:
-    Returns:
+    append_attention
     """
     if current_platform.is_cuda():
-        from fastdeploy.model_executor.ops.gpu import append_attention
-        out = append_attention(
+        out = append_attention_gpu(
             qkv,
             key_cache,
             value_cache,