Project modernization (#630)

* 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

Minecraft.World/SetPlayerTeamPacket.cpp

@@ -42,7 +42,7 @@ SetPlayerTeamPacket::SetPlayerTeamPacket(PlayerTeam *team, vector<wstring> *play
 		__debugbreak();
 #endif
 	}
-	if (playerNames == NULL || playerNames->empty())
+	if (playerNames == nullptr || playerNames->empty())
 	{
 		app.DebugPrintf("Players cannot be null/empty");
 #ifndef _CONTENT_PACKAGE