Add basic handheld GPS (#6896)

Co-authored-by: fishfish458 <fishfish458>

Content.Client/GPS/HandheldGPSComponent.cs

@@ -0,0 +1,65 @@
+using Content.Client.Items.Components;
+using Content.Client.Message;
+using Content.Client.Stylesheets;
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.Controls;
+using Robust.Shared.Timing;
+using Content.Shared.GPS;
+
+namespace Content.Client.GPS
+{
+    [RegisterComponent]
+    internal sealed class HandheldGPSComponent : SharedHandheldGPSComponent, IItemStatus
+    {
+        Control IItemStatus.MakeControl()
+        {
+            return new StatusControl(this);
+        }
+
+        private sealed class StatusControl : Control
+        {
+            private readonly HandheldGPSComponent _parent;
+            private readonly RichTextLabel _label;
+            private float UpdateDif;
+            private readonly IEntityManager _entMan = default!;
+
+            public StatusControl(HandheldGPSComponent parent)
+            {
+                _parent = parent;
+                _entMan = IoCManager.Resolve<IEntityManager>();
+                _label = new RichTextLabel { StyleClasses = { StyleNano.StyleClassItemStatus } };
+                AddChild(_label);
+                UpdateGPSDetails();
+            }
+
+            protected override void FrameUpdate(FrameEventArgs args)
+            {
+                base.FrameUpdate(args);
+
+                UpdateDif += args.DeltaSeconds;
+                if (UpdateDif < _parent.UpdateRate)
+                    return;
+
+                UpdateDif -= _parent.UpdateRate;
+
+                UpdateGPSDetails();
+            }
+
+            public void UpdateGPSDetails()
+            {
+                string posText = "Error";
+                if (_entMan.TryGetComponent<TransformComponent>(_parent.Owner, out TransformComponent? transComp))
+                {
+                    if (transComp.Coordinates != null)
+                    {
+                        var pos =  transComp.MapPosition;
+                        var x = (int) pos.X;
+                        var y = (int) pos.Y;
+                        posText = $"({x}, {y})";
+                    }
+                }
+                _label.SetMarkup(Loc.GetString("handheld-gps-coordinates-title", ("coordinates", posText)));
+            }
+        }
+    }
+}