Paper and pen (#582)

* A very basic paper and pen implementation

* Removes SharedWriteComponent

* Update ContentNetIDs.cs

Content.Client/GameObjects/Components/Paper/PaperWindow.cs

@@ -0,0 +1,36 @@
+using Content.Shared.GameObjects.Components;
+using Robust.Client.UserInterface.Controls;
+using Robust.Client.UserInterface.CustomControls;
+using Robust.Shared.Maths;
+using Robust.Shared.Utility;
+
+namespace Content.Client.GameObjects.Components
+{
+    public class PaperWindow : SS14Window
+    {
+        private readonly RichTextLabel _label;
+        public readonly LineEdit Input;
+        protected override Vector2? CustomSize => (300, 300);
+
+        public PaperWindow()
+        {
+            var container = new VBoxContainer();
+            _label = new RichTextLabel();
+            Input = new LineEdit {Visible = false};
+            container.AddChild(_label);
+            container.AddChild(Input);
+            Contents.AddChild(container);
+        }
+
+        public void Populate(SharedPaperComponent.PaperBoundUserInterfaceState state)
+        {
+            if (state.Mode == SharedPaperComponent.PaperAction.Write)
+            {
+                Input.Visible = true;
+            }
+            var msg = new FormattedMessage();
+            msg.AddMarkup(state.Text);
+            _label.SetMessage(msg);
+        }
+    }
+}