Sanitize shorthand emotes throughought the whole message (#28645)

* Rename ChatSanitizationManager to ChatEmoteSanitizationManager

The prior name was kind of confusing as there's a emote one and
then now there's also chat expansion happening in the accent system,
so knowing which I actually need to edit is useful.

So, I just need to keep myself not confused.

* Rename smileyToEmote and remove punctuation duplicates

The name SmileyToEmote is just... Bad.

Plus, I needed to remove the punctuation duplicates as that would
break any kind of regex parsing that I tried.

* Switch to regex from checking end of string

I also changed from System.Globalization to ILocalizationManager.

Writing that regex was definitely an experience.

* Document regex and the manager

* Rename it back

* Simplify regex

Content.Server/Chat/Managers/IChatSanitizationManager.cs

@@ -6,5 +6,8 @@ public interface IChatSanitizationManager
 {
     public void Initialize();
 
-    public bool TrySanitizeOutSmilies(string input, EntityUid speaker, out string sanitized, [NotNullWhen(true)] out string? emote);
+    public bool TrySanitizeEmoteShorthands(string input,
+        EntityUid speaker,
+        out string sanitized,
+        [NotNullWhen(true)] out string? emote);
 }