Fixing FreeBSD action

Update main.yml

Clarify MAX_PATH limitation in Windows builds of UEFIExtract

Refactor UEFIExtract a bit

Fix extract body action

Enable UI dark mode detection for Linux and FreeBSD, switch to Qt6 fo…

…r them too

Update main.yml

Update action versions to suppress deprecation warnings

Comment out unused (but still generating warnings) floating point par…

…sing functions

Fix a version issue in ACBPv2 definition file

Also force macOS 12 for Coverity

Use constant offsets instead of 1-byte arrays