Support Rebuilding ISO

[NWPlayer123]

Making a separate issue for this as it requires a lot more work. It would be nice if you could rebuild the original ISO with the source code, but that would require rebuild support on nod which is a whole rabbit hole.

• Configuration file if original ISO doesn't exist
  • Table of Contents (file order/offset is nondeterministic and affects read speed and stability in certain games, see the nkit debacle)
  • Junk ID (6 characters, almost always matches GameID)
• Wii Partitions
• Wii Encryption
• Downstream File Modifications (e.g. F-Zero and Animal Crossing can post-process other files on disc and those need to be included as part of dtk's config/rebuild)