feat(character): keep and save the tooltip flags (SetTooltipFlag, char@ttip)

The client sends SetTooltipFlag (469: bFlag, then the tooltip,
2 live packets, both tooltip 24) when a tooltip has been shown, and
follows it with SetFlag for the same ID. DLU dropped it and never wrote
char@ttip, so the client's tooltip bits reset on every load.

- SetTooltipFlag message struct and handler: the bit is set or cleared on
  the CharacterComponent exactly as the client does it
  (LWOCharacterComponent::SendMessage 0x00d34330): tooltips above 127 are
  ignored, set = 1 << tooltip, clear = mask ~1 << tooltip (which also
  clears the lower bits), shifts of 64 or more give 0.
- Saved as char@ttip, a 64-bit value (the client reads it with
  GetLongLongValue in LoadFromSaveData 0x00ca4910). Live wrote it on
  every character (226 live charxmls: "0" or "16777216" = tooltip 24).
  Old saves without it load with 0.

Check in game: on a new character, trigger a first-time tooltip (e.g.
the one about an item or a new area), change zones and log out and back
in: the character loads normally and the same tooltip does not come back.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dGame/dGameMessages/GameMessageHandler.cpp

@@ -193,6 +193,7 @@ namespace {
 		{ PICKUP_CURRENCY, []() { return std::make_unique<PickupCurrency>(); } },
 		{ MODIFY_PLAYER_ZONE_STATISTIC, []() { return std::make_unique<ModifyPlayerZoneStatistic>(); } },
 		{ UPDATE_PLAYER_STATISTIC, []() { return std::make_unique<UpdatePlayerStatistic>(); } },
+		{ SET_TOOLTIP_FLAG, []() { return std::make_unique<SetTooltipFlag>(); } },
 		{ REPORT_BUG, []() { return std::make_unique<ReportBug>(); } },
 		{ VERIFY_ACK, []() { return std::make_unique<VerifyAck>(); } },