Add utility AI (#806)

Co-authored-by: Pieter-Jan Briers <pieterjan.briers@gmail.com>
Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>
Co-authored-by: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>

Content.Client/Commands/DebugPathfindingCommand.cs

@@ -0,0 +1,62 @@
+using Content.Client.GameObjects.EntitySystems.AI;
+using JetBrains.Annotations;
+using Robust.Client.Interfaces.Console;
+using Robust.Shared.GameObjects.Systems;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.IoC;
+
+namespace Content.Client.Commands
+{
+    [UsedImplicitly]
+    internal sealed class DebugPathfindingCommand : IConsoleCommand
+    {
+        // ReSharper disable once StringLiteralTypo
+        public string Command => "pathfinder";
+        public string Description => "Toggles visibility of pathfinding debuggers.";
+        public string Help => "pathfinder [hide/nodes/routes/graph]";
+
+        public bool Execute(IDebugConsole console, params string[] args)
+        {
+#if DEBUG
+            if (args.Length < 1)
+            {
+                return true;
+            }
+
+            var anyAction = false;
+            var debugSystem = EntitySystem.Get<ClientPathfindingDebugSystem>();
+
+            foreach (var arg in args)
+            {
+                switch (arg)
+                {
+                    case "hide":
+                        debugSystem.Disable();
+                        anyAction = true;
+                        break;
+                    // Shows all nodes on the closed list
+                    case "nodes":
+                        debugSystem.ToggleTooltip(PathfindingDebugMode.Nodes);
+                        anyAction = true;
+                        break;
+                    // Will show just the constructed route
+                    case "routes":
+                        debugSystem.ToggleTooltip(PathfindingDebugMode.Route);
+                        anyAction = true;
+                        break;
+                    // Shows all of the pathfinding chunks
+                    case "graph":
+                        debugSystem.ToggleTooltip(PathfindingDebugMode.Graph);
+                        anyAction = true;
+                        break;
+                    default:
+                        continue;
+                }
+            }
+
+            return !anyAction;
+#endif
+            return true;
+        }
+    }
+}