fix: allow dead hardcore players to move as ghosts

[ACaiCat]

Fixed hardcore ghosts don't move server-side

1. In HandlePlayerKillMeV2, set the player's dead state to true:
   

   TShock/TShockAPI/GetDataHandlers.cs

   Lines 4325 to 4326 in a867772

   	args.Player.Dead = true;
   	args.Player.RespawnTimer = TShock.Config.Settings.RespawnSeconds;

2. The player respawns and turns into a ghost, but no respawn packet is sent.
3. In OnGetData, most packets from "dead" ghost players are filtered out, so the server cannot detect player movement and fails to send the correct TileSquare packet.
   

   TShock/TShockAPI/TShock.cs

   Lines 1643 to 1648 in a867772

   	if ((player.State < (int)ConnectionState.Complete || player.Dead) && (int)type > 12 && (int)type != 16 && (int)type != 42 && (int)type != 50 &&
   	(int)type != 38 && (int)type != 21 && (int)type != 22 && type != PacketTypes.SyncLoadout)
   	{
   	e.Handled = true;
   	return;
   	}

[lost-werewolf]

Could this PR also make changes to OnGetData to accept a lot more packets, such as killing projectiles? When a player dies while they have projectiles such as minions or drills/chainsaws, it's common for them to not be killed properly as the packet is rejected.
This "blanket block" of dead player's packets seems to cause more issues than solved problems, & doesn't respect the PreventDeadModification option - should rejection of dead player's packets instead be handling in GetDataHandlers/the Bouncer?

[lost-werewolf]

I've gone through a list of packets that should be entirely ignored from dead players at all times (based on PacketTypes enum):

• PlayerHp (Allows setting HP above 0, causing them to appear "alive" for other clients)
• ChestGetContents
• EffectHeal
• EffectMana
• SignRead
• SignNew
• NpcSpecial
• ChestUnlock
• PlayHarp
• HitSwitch
• UpdateNPCHome
• SpawnBossorInvasion
• PlayerDodge
• Teleport (allows moving while dead)
• PlayerHealOther
• TeleportationPotion (allows moving while dead)
• CreateTemporaryAnimation
• PlayerTeleportPortal (allows moving while dead)
• NebulaLevelUp
• CrystalInvasionStart
• PlayerDeathV2
• Emoji
• RequestTileEntityInteraction
• FishOutNPC
• CrystalInvasionRequestedToSkipWaitTime

The following should ideally be rejected if PreventDeadModification is set to true, which currently do not check for it:

• TileSendSquare, aka Tile Rect (Solutions, tile entity placement, right-clicking certain furniture items)
• ProjectileNew (keep in mind - sentries or other projectiles that split may still be able to trigger this, would look odd)
• NpcStrike (keep in mind - sentries can still damage them or projectiles fired before death)
• TileEntityDisplayDollItemSync
• WeaponsRackTryPlacing
• TileEntityHatRackItemSync
• FoodPlatterTryPlacing
• PaintTile
• PaintWall
• CatchNPC
• ReleaseNPC
• PlaceTileEntity
• PlaceItemFrame
• GemLockToggle
• MassWireOperation
• ToggleParty
• PlayerHurtV2 (keep in mind - sentries can maybe still damage them or projectiles fired before death)

I'm not entirely sure if all of these have handlers in GetDataHandlers. But this list should hopefully be everything a dead player should be unable to do, that a malicious client would try to abuse. It's a bit risky to allow a lot of these from a dead player.