add attention doc

doc/source/index.rst

@@ -28,6 +28,7 @@
    jittor.linalg
    jittor.console
    jittor.distributions
+   jittor.attention
 
 
 .. toctree::

doc/source/jittor.attention.md

@@ -0,0 +1,10 @@
+jittor.attention
+=====================
+
+这里是Jittor的 数据变换 模块的API文档，您可以通过`from jittor import attention`来获取该模块。
+
+```eval_rst
+.. automodule:: jittor.attention
+   :members:
+   :undoc-members:
+```