Make portals use ICollideBehavior and set collidable.Hard to false (#2186)

Content.Shared/GameObjects/Components/Portal/SharedPortalComponent.cs

@@ -0,0 +1,37 @@
+using System;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameObjects.Components;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.GameObjects.Components.Portal
+{
+    public abstract class SharedPortalComponent : Component
+    {
+        public override string Name => "Portal";
+
+        public override void OnAdd()
+        {
+            base.OnAdd();
+
+            if (Owner.TryGetComponent<ICollidableComponent>(out var collidable))
+            {
+                collidable.Hard = false;
+            }
+        }
+    }
+
+    [Serializable, NetSerializable]
+    public enum PortalVisuals
+    {
+        State
+    }
+
+    [Serializable, NetSerializable]
+    public enum PortalState
+    {
+        RecentlyTeleported,
+        Pending,
+        UnableToTeleport,
+    }
+
+}