P2: Modernize C++, clean up dead code, add error handling to junk mode

[sondt99]

Summary

• Replace clock() with std::chrono::steady_clock for accurate wall-clock timing
• Remove srand() from main() — single seeding point remains in TrampolineInjector
• Add try/catch to junk code mode — was missing, exceptions crashed the process
• Check std::getline return values — handle EOF/pipe correctly
• Rename DetectPEArchitecture to detect_pe_architecture (consistent snake_case)
• Rename camelCase locals to snake_case throughout main.cpp
• Remove dead code in cfflattening.h (unused CFF namespace, duplicated BasicBlock struct, unused obfuscatecff_extensions namespace)
• Add <cstdint> / <climits> includes for INT32_MAX/INT32_MIN used in P0 fix
• Remove misleading comment ("32-bit right rotation function" on a strcmp)

Changes Made

File	Changes
main.cpp	C++ modernization, error handling, naming consistency
obfuscatecff.cpp	Add <cstdint>/<climits>, remove misleading comment
cfflattening.h	Remove dead code (unused namespaces, duplicated struct)

Checklist

• clock() → std::chrono::steady_clock in both modes
• srand() removed from main() (single seed in TrampolineInjector)
• try/catch added to mode_trampoline_junkcode()
• std::getline return values checked (3 locations)
• std::isdigit called with unsigned char cast
• DetectPEArchitecture → detect_pe_architecture
• All camelCase locals in detect function → snake_case
• #define NOMINMAX removed (now in vcxproj preprocessor defs)
• is_64_bit initialized to false in junk mode
• Dead CFF and obfuscatecff_extensions namespaces removed from cfflattening.h
• Misleading "32-bit right rotation function" comment removed

Test plan

• Build succeeds in Release|x64
• CFF mode: obfuscate test binary → verify output
• Junk mode: obfuscate test binary → verify output
• Junk mode error handling: test with invalid path → verify error message (no crash)
• Run match_check.py on full test suite

Closes #9, Closes #11