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/ZoneIo.cpp

@@ -22,8 +22,8 @@ void ZoneIo::write(byteArray bb, int size)
 void ZoneIo::write(ByteBuffer *bb, int size)
 {
 	DWORD numberOfBytesWritten;
-	SetFilePointer(channel,(int)pos,NULL,NULL);
-	WriteFile(channel,bb->getBuffer(), bb->getSize(),&numberOfBytesWritten,NULL);
+	SetFilePointer(channel,static_cast<int>(pos),nullptr,nullptr);
+	WriteFile(channel,bb->getBuffer(), bb->getSize(),&numberOfBytesWritten,nullptr);
     pos += size;
 }
 
@@ -31,13 +31,13 @@ ByteBuffer *ZoneIo::read(int size)
 {
 	DWORD numberOfBytesRead;
     byteArray bb = byteArray(size);
-	SetFilePointer(channel,(int)pos,NULL,NULL);
+	SetFilePointer(channel,static_cast<int>(pos),nullptr,nullptr);
     ByteBuffer *buff = ByteBuffer::wrap(bb);
 	// 4J - to investigate - why is this buffer flipped before anything goes in it?
     buff->order(ZonedChunkStorage::BYTEORDER);
     buff->position(size);
     buff->flip();
-	ReadFile(channel, buff->getBuffer(), buff->getSize(), &numberOfBytesRead, NULL);
+	ReadFile(channel, buff->getBuffer(), buff->getSize(), &numberOfBytesRead, nullptr);
     pos += size;
     return buff;
 }