Added missing config files `env/maniskill_example.yaml` and `policy/sac_maniskill.yaml` that are necessary to run the lerobot implementation of sac with the maniskill baselines.

Co-authored-by: Adil Zouitine <adilzouitinegm@gmail.com>

lerobot/configs/env/maniskill_example.yaml

@@ -0,0 +1,15 @@
+# @package _global_
+
+fps: 20
+
+env:
+  name: maniskill/pushcube
+  task:  PushCube-v1
+  image_size: 64
+  control_mode: pd_ee_delta_pose
+  state_dim: 25
+  action_dim: 7
+  fps: ${fps}
+  obs: rgb
+  render_mode: rgb_array
+  render_size: 64