This needs improvement

[ultraviolet-jordan]

https://github.com/LostCityRS/Engine/blob/e90b2f48d92394253e9e35d886ec2e419b5b3770/src/io/Packet.ts#L344

• Use | over +.
• Use U16/32 instead of U8 over and over.
• Use the built in boolean provided to either use big endianess or small endianess.