Implement aggro meter for RoF2 (RoF wasn't tested)

I didn't test RoF, so it's disabled for now (change AggroMeterAvaliable if you want to test)

Group member meters probably buggy ... but do later

The "lock target" feature isn't working currently either

common/emu_oplist.h

@@ -25,6 +25,9 @@ N(OP_AdventureRequest),
 N(OP_AdventureStatsReply),
 N(OP_AdventureStatsRequest),
 N(OP_AdventureUpdate),
+N(OP_AggroMeterLockTarget),
+N(OP_AggroMeterTargetInfo),
+N(OP_AggroMeterUpdate),
 N(OP_AltCurrency),
 N(OP_AltCurrencyMerchantReply),
 N(OP_AltCurrencyMerchantRequest),

common/ruletypes.h

@@ -114,6 +114,7 @@ RULE_BOOL(Character, CheckCursorEmptyWhenLooting, true) // If true, a player can
 RULE_BOOL(Character, MaintainIntoxicationAcrossZones, true) // If true, alcohol effects are maintained across zoning and logging out/in.
 RULE_BOOL(Character, EnableDiscoveredItems, true) // If enabled, it enables EVENT_DISCOVER_ITEM and also saves character names and timestamps for the first time an item is discovered.
 RULE_BOOL(Character, EnableXTargetting, true) // Enable Extended Targetting Window, for users with UF and later clients.
+RULE_BOOL(Character, EnableAggroMeter, true) // Enable Aggro Meter, for users with RoF and later clients.
 RULE_BOOL(Character, KeepLevelOverMax, false) // Don't delevel a character that has somehow gone over the level cap
 RULE_INT(Character, FoodLossPerUpdate, 35) // How much food/water you lose per stamina update
 RULE_INT(Character, BaseInstrumentSoftCap, 36) // Softcap for instrument mods, 36 commonly referred to as "3.6" as well.