Fixed it by clearing the screen state of the PPU.

Allows options to go down one level.
Enables custom agent versioning.

By setting proper sound raw values.

Also added all major APU constant addresses.
Disabled serial transfer on state loading.

The DMA transfer was being incorrectly triggered while loading the state.

Allows modularity and extendability in Zippy.

Uses hardware acceleration if available, otherwise falls back to software implementation.

Includes strong header which includes CRC32.

Also simplified error to string conversion.

This approach avoids many of the possible panics.