Added elasticity and sensor subfolders in model/plugin.

PiperOrigin-RevId: 558751363
Change-Id: I15acefc88e5fead1069b58ffb722ea4dc5d53c9b

doc/changelog.rst

@@ -119,7 +119,7 @@ Plugins
 ^^^^^^^
 
 5. Added touch-grid sensor plugin. See `documentation <https://github.com/deepmind/mujoco/blob/main/plugin/sensor/README.md>`_
-   for details, and associated `touch_grid.xml <https://github.com/deepmind/mujoco/blob/main/model/plugin/touch_grid.xml>`_
+   for details, and associated `touch_grid.xml <https://github.com/deepmind/mujoco/blob/main/model/plugin/sensor/touch_grid.xml>`_
    example model. The plugin includes `in-scene visualisation <https://youtu.be/0LOJ3WMnqeA>`_.
 
 Simulate

model/plugin/elasticity/scene.xml

@@ -38,4 +38,4 @@
 
     <geom name="ground" type="plane" size="0 0 1" pos="0 0 0" quat="1 0 0 0" material="matplane" condim="1"/>
   </worldbody>
-</mujoco>
+</mujoco>

plugin/sensor/README.md

@@ -69,7 +69,7 @@ Note the following:
  <img src="http://img.youtube.com/vi/0LOJ3WMnqeA/hqdefault.jpg" alt="Watch the video" width="560" height="315"/>
 </a>
 
-See [touch_grid.xml](../../model/plugin/touch_grid.xml) to play with the model above.
+See [touch_grid.xml](../../model/plugin/sensor/touch_grid.xml) to play with the model above.
 
 ### Illustration of fields-of-view in spherical coordinates