fix(pe): skip indirect section names for PE images

[leno23]

Summary

• Add parse_indirect_section_names to ParseOptions (default: false for PE)
• Only resolve /offset and //base64 COFF section name references when parsing COFF object files
• Enable indirect section name parsing for Coff::parse via ParseOptions::coff()

Fixes #487

Test plan

• cargo test --lib pe::section_table::tests
• cargo test --lib string_table_excludes_length
• New tests for PE literal /1234567 names and COFF indirect parsing

[kkent030315]

Thanks for the PR!

Relevant issue: #487

I think we need some discussion whether we really need this? I like this, but don't know if we should go this direction.

[leno23]

Resolved the merge conflict with upstream master in commit db586c8 and applied rustfmt to the PE COFF section parsing line.

During the merge, upstream added parse_imports while this branch added parse_indirect_section_names; both options are preserved. I also updated the PE indirect-section-name integration test to match the branch semantics: PE images keep /512 as the literal section name by default, while COFF-specific indirect parsing remains covered through ParseOptions::coff().

Local verification:

• cargo fmt -- --check
• cargo build
• cargo test