[Improvement] Filtered Messages Extension (#4435)

* [Improvment] Filtered Messages Extension

Added:
ItemSpeech 25
Strikethrough 26
Stuns 27
BardSongsOnPets 28

I wired up Strikethrough and Stuns as they already had message entries.

ItemSpeech and BardSongsOnPets do not appear to be currently used in the source.

Note: There are still 5 unknown Filters in RoF2 that need to be investigated:

Achievments
Fellowships
Mercenary Messages
PVP Messages
Spam

* Spelling Error

* Missed some stun calls

zone/client.cpp

@@ -3403,6 +3403,11 @@ void Client::ServerFilter(SetServerFilter_Struct* filter){
 	} else { // these clients don't have a 'self only' filter
 		Filter1(FilterHealOverTime);
 	}
+
+	Filter1(FilterItemSpeech);
+	Filter1(FilterStrikethrough);
+	Filter1(FilterStuns);
+	Filter1(FilterBardSongsOnPets);
 }
 
 // this version is for messages with no parameters
@@ -12700,4 +12705,4 @@ bool Client::TakeMoneyFromPPWithOverFlow(uint64 copper, bool update_client)
 	SaveCurrency();
 	RecalcWeight();
 	return true;
-}
+}