password protected archive support

[vapier]

some archive formats (like 7z) support passwords. see if it's feasible to support.

[vapier]

while the unarchiver project itself has hooks for requesting passwords from the user, the 7zip format specifically in libarchive does not currently support encrypted files

the current release is 3.3.2:

• libarchive/archive_read_support_format_7zip.c#L1287
• libarchive/archive_read_support_format_7zip.c#3357

notice both those code paths end in "not supported" errors. until libarchive supports this stuff, there's not much we can do in WGU.

[Greeneisgood]

😅