Throw runtime error when inheriting from TimedRobot

Replaces compile-time error (which was not clear during failed builds), but does not affect deprecation warning

junction/shims/wpilib/src/edu/wpi/first/wpilibj/TimedRobot.java

@@ -5,11 +5,13 @@
 package edu.wpi.first.wpilibj;
 
 /**
- * @Deprecated The main robot class should inherit from LoggedRobot instead of
- *             TimedRobot when using AdvantageKit's WPILib shims.
+ * @Deprecated The main robot class must inherit from LoggedRobot instead of
+ *             TimedRobot when using AdvantageKit's WPILib shims. For more
+ *             details, check the AdvantageKit installation documentation:
+ *             https://github.com/Mechanical-Advantage/AdvantageKit/blob/main/docs/INSTALLATION.md
  */
 @Deprecated
-public final class TimedRobot {
+public class TimedRobot extends IterativeRobotBase {
   static class Callback implements Comparable<Callback> {
     public Runnable func;
     public double period;
@@ -37,9 +39,15 @@ public int compareTo(Callback rhs) {
   public static final double kDefaultPeriod = 0.02;
 
   protected TimedRobot() {
+    this(kDefaultPeriod);
   }
 
   protected TimedRobot(double period) {
+    super(period);
+    DriverStation.reportError(
+        "The main robot class must inherit from LoggedRobot when using AdvantageKit's WPILib shims. For more details, check the AdvantageKit installation documentation: https://github.com/Mechanical-Advantage/AdvantageKit/blob/main/docs/INSTALLATION.md\n\n*** EXITING DUE TO INVALID ADVANTAGEKIT INSTALLATION, SEE ABOVE. ***",
+        false);
+    System.exit(1);
   }
 
   public void close() {

junction/shims/wpilib/src/edu/wpi/first/wpilibj/TimesliceRobot.java

@@ -5,14 +5,17 @@
 package edu.wpi.first.wpilibj;
 
 /**
- * @Deprecated The main robot class should inherit from LoggedRobot instead of
- *             TimesliceRobot when using AdvantageKit's WPILib shims.
+ * @Deprecated The main robot class must inherit from LoggedRobot instead of
+ *             TimesliceRobot when using AdvantageKit's WPILib shims. For more
+ *             details, check the AdvantageKit installation documentation:
+ *             https://github.com/Mechanical-Advantage/AdvantageKit/blob/main/docs/INSTALLATION.md
  */
 @Deprecated
-public final class TimesliceRobot {
-    public TimesliceRobot(double robotPeriodicAllocation, double controllerPeriod) {
-    }
+public class TimesliceRobot extends TimedRobot {
+  public TimesliceRobot(double robotPeriodicAllocation, double controllerPeriod) {
+    super();
+  }
 
-    public void schedule(Runnable func, double allocation) {
-    }
+  public void schedule(Runnable func, double allocation) {
+  }
 }