[docs] Fix Doxygen warnings, add CI docs lint job (#3639)

The CI docs lint build is configured to fail on Doxygen warnings.

wpilibc/src/main/native/include/frc/motorcontrol/PWMMotorController.h

@@ -36,14 +36,14 @@ class PWMMotorController : public MotorController,
    * The PWM value is set using a range of -1.0 to 1.0, appropriately scaling
    * the value for the FPGA.
    *
-   * @param speed The speed value between -1.0 and 1.0 to set.
+   * @param value The speed value between -1.0 and 1.0 to set.
    */
   void Set(double value) override;
 
   /**
    * Get the recently set value of the PWM. This value is affected by the
    * inversion property. If you want the value that is sent directly to the
-   * MotorController, use {@link PWM#getSpeed()} instead.
+   * MotorController, use PWM::GetSpeed() instead.
    *
    * @return The most recently set value for the PWM between -1.0 and 1.0.
    */