Implement extended format m64 support

[Aurumaker72]

Summary

This PR adds support for the new (1.1.9+) extended format.

Previously, opening extended format movies would crash due to the round-trip check failing:

if (!Enumerable.SequenceEqual(bytes, ToBytes())) throw new ArgumentOutOfRangeException();

This has been resolved by adding the new required fields.

Caveats

Version-specific table entries (e.g. Authorship Tag) are always visible, even if the movie's extended version dictates those variables invalid. This is not an issue for Mupen, as it handles that case, but can still be confusing at a UX level.

Since the now-unused regions aren't serialized, this process will have to be repeated again when the next format update happens.

[FramePerfection]

For what it is, it fixes a compatibility issue ad hoc.

I'm not happy with it, but that stems from the nature of the entire tab that this class is a part of. It either needs a fundamental redesign, including a from-the-ground-up reimplementation, or should just be purged from STROOP entirely in the long run.
Either way, that's not within the scope of this """fix""".