Some .btex files crash Flagrum on preview/export

[NotVoosh]

Describe the bug
Some .btex files crash Flagrum on preview/export.

To Reproduce
Preview or export one of the following textures:

data://asset/environment/system/defaulttextures/env_colorrapm01_b.btex
data://asset/environment/system/defaulttextures/break/sourceimages/ any file
sdk://textures/luts/smaa/areatexdx9.btex
sdk://textures/cloud/weathermask.btex

Expected behavior
Not a crash

Crash logs
2024-02-12_03-57-09-4636_crash_1282346678.txt
2024-02-12_04-00-26-3669_crash_130231568.txt
2024-02-12_03-59-37-3164_crash_491305870.txt
2024-02-12_03-57-40-3394_crash_1805688915.txt

Screenshots

Additional context
Nothing relevant to this case your Honor

[Kizari]

Seems to be more nonsense around how Forspoken handles pixel data very differently, rather than a bug with the existing code. Changing this to an enhancement since it better reflects that extra work would need to be done to understand and support these formats.

[Kizari]

Will need to give this issue the same treatment as #126 (comment)