feat: remove bufferpack

[Julusian]

trafficstars

This isnt complete and isnt fully tested, so I am leaving this as a draft until it can be.

While bufferpack was probably useful in verifying the implementation matches the python it was based upon, it feels like an unnecessary dependency that adds a layer of obfuscation to how the serializing/deserializing is done.
Both bufferpack and this library are using deprecated new Buffer() calls, this replaces all of those.