Refactoring of roles and notifications about antagonist assignment (#16864)

* Refactoring of antagonist roles and notifications about antagonist role assignment.
Refactoring of traitor assignment methods and bug fixing.

* Announcement files moved, code is adjusted to new revision

* Play to entity changed to play to global cause of mono audio restrictions.

* Path to audio files changed to sound specifiers, unique alerts for each role.

* Uncommited changes

* New alert sounds for each antag role.

* PR review fixes

* Antagonist role assignment sound notifications moved to Systems, sounds moved to Components.

* License update

* Fixed naming and redundant parameters

---------

Co-authored-by: Титов Вячеслав Витальевич <rincew1nd@yandex.ru>

Content.Server/Traitor/TraitorRole.cs

@@ -1,34 +0,0 @@
-using Content.Server.Chat.Managers;
-using Content.Server.Roles;
-using Content.Shared.PDA;
-using Content.Shared.Roles;
-
-namespace Content.Server.Traitor
-{
-    public sealed class TraitorRole : Role
-    {
-        public AntagPrototype Prototype { get; }
-
-        public TraitorRole(Mind.Mind mind, AntagPrototype antagPrototype) : base(mind)
-        {
-            Prototype = antagPrototype;
-            Name = Loc.GetString(antagPrototype.Name);
-            Antagonist = antagPrototype.Antagonist;
-        }
-
-        public override string Name { get; }
-        public override bool Antagonist { get; }
-
-        public void GreetTraitor(string[] codewords, Note[] code)
-        {
-            if (Mind.TryGetSession(out var session))
-            {
-                var chatMgr = IoCManager.Resolve<IChatManager>();
-                var entMgr = IoCManager.Resolve<IEntityManager>();
-                chatMgr.DispatchServerMessage(session, Loc.GetString("traitor-role-greeting"));
-                chatMgr.DispatchServerMessage(session, Loc.GetString("traitor-role-codewords", ("codewords", string.Join(", ", codewords))));
-                chatMgr.DispatchServerMessage(session, Loc.GetString("traitor-role-uplink-code", ("code", string.Join("", code))));
-            }
-        }
-    }
-}