Add a Walking alert (#32954)

* Initial commit

* Review feedback changes

* ProtoId

* TempCommit

* First attempt to have client alerts

* Review changes

Content.Server/Alert/ServerAlertsSystem.cs

@@ -1,7 +1,19 @@
 using Content.Shared.Alert;
+using Robust.Shared.GameStates;
 
 namespace Content.Server.Alert;
 
 internal sealed class ServerAlertsSystem : AlertsSystem
 {
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<AlertsComponent, ComponentGetState>(OnGetState);
+    }
+
+    private void OnGetState(Entity<AlertsComponent> alerts, ref ComponentGetState args)
+    {
+        args.State = new AlertComponentState(alerts.Comp.Alerts);
+    }
 }