Add virtual chat API methods in Shared (#40895)

* move chat stuff to shared

* refactor: using cleanup +whitespaces + xml-doc

* review

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Co-authored-by: pa.pecherskij <pa.pecherskij@interfax.ru>

Content.Server/Cloning/CloningPodSystem.cs

@@ -11,6 +11,7 @@ using Content.Shared.Atmos;
 using Content.Shared.CCVar;
 using Content.Shared.Chemistry.Components;
 using Content.Shared.Cloning;
+using Content.Shared.Chat;
 using Content.Shared.Damage;
 using Content.Shared.DeviceLinking.Events;
 using Content.Shared.Emag.Components;