content: Specify Leo control options from WebUI (#138)

* content: Add control options for Rover via Web UI including virtual joystick, keyboard, and gamepad

* Format

* Add new word to cspell

* Update gamepad steering instructions

Author: jasiex01

cspell.json

@@ -152,6 +152,7 @@
         "uros",
         "velodyne",
         "VRTKCAM",
+        "WASD",
         "WEIPU",
         "widowx",
         "wlan",

docs/leo-rover/documentation/getting-started.mdx

@@ -81,6 +81,19 @@ http://10.0.0.1/
   height="1080"
 />
 
+From the Web UI, you can access the Rover's camera stream and control the
+Rover's movement using various control options:
+
+- **Virtual joystick**: Use the on-screen joystick to control the Rover's
+  movement in all directions.
+- **Keyboard**: Use the arrow keys or WASD keys on your keyboard to control the
+  Rover's movement.
+- **Gamepad**: If you have a gamepad connected to your device, you can use it to
+  control the Rover's movement. The gamepad should be automatically detected by
+  the Web UI. To drive with the gamepad, hold the **RB** button (or its
+  equivalent), use the left joystick up and down for linear motion, and use the
+  right joystick left and right for angular motion.
+
 ## Turn off the Rover properly
 
 Due to the system architecture, the Rover needs to be turned off the old-school