Support M64 extended format version 4 (Mupen 1.5.0-3)

[frKieran]

Fixes #66.

Movies recorded on Mupen 1.5.0-3 can't be opened in the M64 tab: it shows "Unhandled exception has occurred… Specified argument was out of the range of valid values." and the movie isn't loaded. Movies with extended version 0 or 1 open fine.

Extended version 4 (1.5.0-3) added two doubles to the extended data, cpu_cf at 0x030 and rcp_lag_factor at 0x038 (CoreVCRExtendedMovieData in Mupen's Core/Types.hpp). M64Header.ToBytes still wrote 0x030..0x0C3 as zero padding, so the roundtrip check at the end of LoadBytes failed as soon as cpu_cf was set (1.0 is f0 3f at 0x036, so every 1.5.0-3 movie).

This PR:

• reads and writes the two fields (shown under Main as "CPU Counter Factor" and "RCP Lag Factor");
• writes the bytes M64Header doesn't model (0x01E, 0x040..0x0C3, 0x0EA..0x121) back from the loaded header instead of zeros, so the next extended-format addition doesn't break loading again.

Tested on Windows with a Release build of this branch (and the same change on v0.9.1): a 1.5.0-3 movie, an extended v1 movie and a v0 movie all open, and Save leaves each file byte-identical apart from the VI count ("Max Out VI Count"). Without the change, the 1.5.0-3 movie throws as above.

Related, on the Mupen side: with Mupen's "Extended Movie Format" option off, 1.5.0-3 still writes cpu_cf there, so turning it off doesn't avoid this. PR by Claude Code, take with a grain of salt.

[abart27]

LGTM

[FramePerfection]

Looks fine to me, too.

A quick notice on merging this into Development though:
For fixes like this, it could be better to branch off the Release branch and PR into that one as a "hotfix" - it'll be merged into Development, too, of course, but it's easier to release a new fixed version (0.9.2 in this case) without the other stuff on Development (Wine support things currently, which I may not want to release just yet, because that'd definitely be a 0.10.0, and then there are other things I'd like to get into that, and so on.)

I'll leave this open until tomorrow or so if you want to do that @frKieran .