feature (PE): add rich header

More about rich header: .

Algorithm for parsing:

Absence of rich header parsing for me is a non-issue but may be useful for those who do cybersecurity and malware analysis.

Read the linked Microsoft Rich Header and PE parsing algorithm references, then inspect goblin's existing PE parsing entry points; no file or test is named in the issue. Done means rich headers are parsed when present and the resulting data is exposed consistently, with coverage for the supported header cases.

Written by the indexing model from the issue text.