Don't apply transforms when scale 1.0, adjust translation to be gradual

Item_CheckObtainability should only be called with MOD_NONE GI

For RG_DOUBLE_DEFENSE that became ITEM_FISH. Nonsense ensued

To reproduce issue, create debug save & go straight to OGC great fairy with only magic/ocarina/lullaby

Before I had the change back to the placeholder actor id the Dummy
Player actors were spawned with, but since we grabbed the actorDB
entry before Actor_Destroy was called it didn't matter. Move it
and the requisite log statement to after Actor_Destroy.

Move stuff to main file, delete header & refactor lists

The sampleDataStartPad and aligned variables existed solely to satisfy
the N64 RSP DMA requirement that source addresses be 16-byte aligned.
On PC, aLoadBuffer is a plain memcpy with no such constraint.

The alignment dance caused aLoadBuffer to read up to 15 bytes before
sampleData and up to 8+ bytes past the end of the sample buffer. On
platforms with strict allocator guard pages (e.g. OpenBSD), this
triggers a SIGSEGV.

A second issue remains after removing the alignment dance: nFramesToDecode
is derived from sample counts (loopEnd), but size is not always a multiple
of frameSize. loopEnd and size are derived independently during encoding
and can disagree on the final partial frame, leaving nFramesToDecode *
frameSize exceeding the remaining bytes in the buffer.

Remove sampleDataStartPad and aligned entirely. Clamp the load to
min(nFramesToDecode * frameSize, audioFontSample->size - sampleDataOffset).
The ADPCM decoder operates on DMEM, so a partial last frame in DMEM
produces at most a negligible artifact at sound termination.

Hookify bgimage load cam check and add it to entrance rando