Move Access & AccessReader to shared. (#5798)

* git mv

* Move Access Component & system.

- Name space changes
- Rename AccessReader to AccessReaderComponent
- Also need an abstract TryGetSlot function for SharedInventoryComponent

* better TryGetSlot

* Ah yes, tests exist.

Content.Server/Access/Systems/PresetIdCardSystem.cs

@@ -1,4 +1,5 @@
 using Content.Server.Access.Components;
+using Content.Shared.Access.Systems;
 using Content.Shared.Roles;
 using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;