Get information about .nes file (NES ROM).

• Support iNES, NES 2.0, Nintendo Header
• Description of mappers (first 256)
• Checksums (CRC32, MD5, SHA-1)
• Checking hashes in nes20db.xml (NES 2.0 XML Database, put file in current directory)
• CLI & Web (Emscripten)

• https://wiki.nesdev.org
• https://unlicensed.games/libg/static.php?page=NintendulatorNRS
• https://github.com/TASEmulators/fceux
• https://ucon64.sourceforge.io
• https://create.stephan-brumme.com/crc32/
• https://github.com/Zunawe/md5-c
• https://github.com/clibs/sha1