Allow all door access in Suspicion mode (#1817)

* Add AccessTypes, let RuleSuspicion change it

* Fix enum description

Co-authored-by: DrSmugleaf <DrSmugleaf@users.noreply.github.com>

* Move check to CanOpen()

Co-authored-by: DrSmugleaf <DrSmugleaf@users.noreply.github.com>

Content.Server/GameObjects/EntitySystems/DoorSystem.cs

@@ -1,10 +1,44 @@
 using Content.Server.GameObjects.Components.Doors;
+using JetBrains.Annotations;
 using Robust.Shared.GameObjects.Systems;
 
 namespace Content.Server.GameObjects.EntitySystems
 {
+    [UsedImplicitly]
     class DoorSystem : EntitySystem
     {
+        /// <summary>
+        ///     Determines the base access behavior of all doors on the station.
+        /// </summary>
+        public AccessTypes AccessType { get; set; }
+
+        /// <summary>
+        /// How door access should be handled.
+        /// </summary>
+        public enum AccessTypes
+        {
+            /// <summary> ID based door access. </summary>
+            Id,
+            /// <summary>
+            /// Allows everyone to open doors, except external which airlocks are still handled with ID's
+            /// </summary>
+            AllowAllIdExternal,
+            /// <summary>
+            /// Allows everyone to open doors, except external airlocks which are never allowed, even if the user has
+            /// ID access.
+            /// </summary>
+            AllowAllNoExternal,
+            /// <summary> Allows everyone to open all doors. </summary>
+            AllowAll
+        }
+
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            AccessType = AccessTypes.Id;
+        }
+
         /// <inheritdoc />
         public override void Update(float frameTime)
         {