Modernize project codebase (#906)

* Fixed boats falling and a TP glitch #266

* Replaced every C-style cast with C++ ones

* Replaced every C-style cast with C++ ones

* Fixed boats falling and a TP glitch #266

* Updated NULL to nullptr and fixing some type issues

* Modernized and fixed a few bugs

- Replaced most instances of `NULL` with `nullptr`.
- Replaced most `shared_ptr(new ...)` with `make_shared`.
- Removed the `nullptr` macro as it was interfering with the actual nullptr keyword in some instances.

* Fixing more conflicts

* Replace int loops with size_t and start work on overrides

* Add safety checks and fix a issue with vector going OOR

Minecraft.World/Command.cpp

@@ -24,7 +24,7 @@ void Command::logAdminAction(shared_ptr<CommandSender> source, ChatPacket::EChat
 
 void Command::logAdminAction(shared_ptr<CommandSender> source, int type, ChatPacket::EChatPacketMessage messageType, const wstring& message, int customData, const wstring& additionalMessage)
 {
-	if (logger != NULL)
+	if (logger != nullptr)
 	{
 		logger->logAdminCommand(source, type, messageType, message, customData, additionalMessage);
 	}
@@ -39,7 +39,7 @@ shared_ptr<ServerPlayer> Command::getPlayer(PlayerUID playerId)
 {
 	shared_ptr<ServerPlayer> player = MinecraftServer::getInstance()->getPlayers()->getPlayer(playerId);
 
-	if (player == NULL)
+	if (player == nullptr)
 	{
 		return nullptr;
 	}