Improved bootloader parsing (#356)

[magerstam]

Merge Checklist

All boxes should be checked before merging the PR

• The changes in the PR have been built and tested
• Ready to merge

Description

Bootloader parsing improvement

Any Newly Introduced Dependencies

How Has This Been Tested?

go tests

[Copilot]

Pull request overview

This PR improves bootloader parsing logic by enhancing FAT filesystem detection and EFI binary classification. The changes add validation checks to prevent incorrect filesystem parsing and introduce SHA256-based inheritance for identifying bootloader types.

Changes:

• Added sanity checks for FAT filesystem BPB (BIOS Parameter Block) validation
• Introduced SHA256-based bootloader kind inheritance for detecting identical EFI binaries
• Improved bootloader classification logic by reordering checks and adding MokManager detection

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
internal/image/imageinspect/fs_raw.go	Calls the new SHA-based bootloader kind inheritance function before sorting
internal/image/imageinspect/fs_inspect.go	Adds BPB validation checks and diagnostic notes for FAT filesystem parsing
internal/image/imageinspect/bootloader_pe.go	Implements SHA256-based kind inheritance and refines bootloader classification logic

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[arodage]

LGTM