Add in binary parsing

[CosmicHorrorDev]

Currently only text parsing is supported, but there is also a binary format provided for vdf. Since pest doesn't support binary parsing we'll have to pull in some other parsing library as well that supports binary parsing.

[murlakatamenka]

This source will probably help to implement binary parsing without other dependencies:

https://github.com/ValvePython/vdf/blob/d76292623e326fb165fe3bdb684832cdf30959d4/vdf/init.py#L316-L422

[FlashyReese]

I recently wrote a basic deserializer for binary VDF: https://github.com/FlashyReese/decky-wine-cellar/blob/application-management/backend/src/vdf_util.rs.

However, this doesn't guarantee a safe serialization back into binary format because we don't store the data type of the value.