Scripts/Commands: Allow to set a custom duration to the Freeze command applied Aura

- Allow to set a default duration for the Freeze Aura in worldserver.conf
- Handle the .freeze and .unfreeze command custom effects through the Freeze AuraScript
- Make players able to eventually unfreeze by themselves since the aura will expire without someone having to use .unfreeze
- Make .freeze command usable with the following syntax:

      * .freeze (with a targeted player)
      * .freeze duration_in_seconds (with a targeted player)
      * .freeze playername duration (if duration is an invalid value it will be defaulted to the config one)
      * .freeze playername (in this case, duration will be defaulted to the config value)

- Make .listfreeze command able to show the remaining freeze duration on all affected players

Closes #12972

src/server/shared/Database/Implementation/CharacterDatabase.cpp

@@ -417,7 +417,7 @@ void CharacterDatabaseConnection::DoPrepareStatements()
     PrepareStatement(CHAR_DEL_CHARACTER_SOCIAL, "DELETE FROM character_social WHERE guid = ? AND friend = ?", CONNECTION_ASYNC);
     PrepareStatement(CHAR_UPD_CHARACTER_SOCIAL_NOTE, "UPDATE character_social SET note = ? WHERE guid = ? AND friend = ?", CONNECTION_ASYNC);
     PrepareStatement(CHAR_UPD_CHARACTER_POSITION, "UPDATE characters SET position_x = ?, position_y = ?, position_z = ?, orientation = ?, map = ?, zone = ?, trans_x = 0, trans_y = 0, trans_z = 0, transguid = 0, taxi_path = '' WHERE guid = ?", CONNECTION_ASYNC);
-    PrepareStatement(CHAR_SEL_CHARACTER_AURA_FROZEN, "SELECT characters.name FROM characters LEFT JOIN character_aura ON (characters.guid = character_aura.guid) WHERE character_aura.spell = 9454", CONNECTION_SYNCH);
+    PrepareStatement(CHAR_SEL_CHARACTER_AURA_FROZEN, "SELECT characters.name, character_aura.remaintime FROM characters LEFT JOIN character_aura ON (characters.guid = character_aura.guid) WHERE character_aura.spell = 9454", CONNECTION_SYNCH);
     PrepareStatement(CHAR_SEL_CHARACTER_ONLINE, "SELECT name, account, map, zone FROM characters WHERE online > 0", CONNECTION_SYNCH);
     PrepareStatement(CHAR_SEL_CHAR_DEL_INFO_BY_GUID, "SELECT guid, deleteInfos_Name, deleteInfos_Account, deleteDate FROM characters WHERE deleteDate IS NOT NULL AND guid = ?", CONNECTION_SYNCH);
     PrepareStatement(CHAR_SEL_CHAR_DEL_INFO_BY_NAME, "SELECT guid, deleteInfos_Name, deleteInfos_Account, deleteDate FROM characters WHERE deleteDate IS NOT NULL AND deleteInfos_Name LIKE CONCAT('%%', ?, '%%')", CONNECTION_SYNCH);