Added go 1 and go 1 velocity tracking example

Go1VelocityTracking/metadata.yaml

@@ -0,0 +1,18 @@
+Name: "Go1 Velocity Tracking"
+Category: Examples
+RequiredContent:
+  - "UnitreeGo1"
+Description: >
+  A velocity tracking example scene for the Unitree Go1 that demonstrates commanding
+  and tracking base motion in a ready-to-run setup.
+Tags:
+  - example
+  - robotics
+  - velocity
+  - tracking
+  - go1
+  - unitree
+Files:
+  - 'Go1VelocityTracking/VelocityTracking.hscene'
+  - 'Go1VelocityTracking/VelocityTracking.hzr'
+  - 'Go1VelocityTracking/Scripts/VelocityTracking.cs'