Knowledge UI (#779)

* knowledge button in HUD

* ui controller

* bugfixes

* finish

* all-knowing ghosts

* Create knowledge-ui.ftl

Content.Shared/_CP14/Knowledge/SharedCP14KnowledgeSystem.cs

@@ -2,6 +2,7 @@ using System.Text;
 using Content.Shared._CP14.Knowledge.Components;
 using Content.Shared._CP14.Knowledge.Prototypes;
 using Content.Shared.DoAfter;
+using Content.Shared.Ghost;
 using Content.Shared.MagicMirror;
 using Content.Shared.Paper;
 using Robust.Shared.Prototypes;
@@ -65,6 +66,9 @@ public abstract partial class SharedCP14KnowledgeSystem : EntitySystem
         ProtoId<CP14KnowledgePrototype> knowledge,
         CP14KnowledgeStorageComponent? knowledgeStorage = null)
     {
+        if (HasComp<GhostComponent>(uid)) //All-knowing ghosts
+            return true;
+        
         if (!Resolve(uid, ref knowledgeStorage, false))
             return false;
 
@@ -92,3 +96,27 @@ public sealed partial class CP14KnowledgeLearnDoAfterEvent : DoAfterEvent
     public ProtoId<CP14KnowledgePrototype> Knowledge;
     public override DoAfterEvent Clone() => this;
 }
+
+[Serializable, NetSerializable]
+public sealed class CP14KnowledgeInfoEvent : EntityEventArgs
+{
+    public readonly NetEntity NetEntity;
+    public readonly HashSet<ProtoId<CP14KnowledgePrototype>> AllKnowledge;
+
+    public CP14KnowledgeInfoEvent(NetEntity netEntity, HashSet<ProtoId<CP14KnowledgePrototype>> allKnowledge)
+    {
+        NetEntity = netEntity;
+        AllKnowledge = allKnowledge;
+    }
+}
+
+[Serializable, NetSerializable]
+public sealed class RequestKnowledgeInfoEvent : EntityEventArgs
+{
+    public readonly NetEntity NetEntity;
+
+    public RequestKnowledgeInfoEvent(NetEntity netEntity)
+    {
+        NetEntity = netEntity;
+    }
+}