[Feature] Allow automatic importing of Packwiz modpacks

[Merith-TK]

https://packwiz.infra.link/

Packwiz is an modpack format that is the go to for automatically updating modpacks on third party launchers that do pre-launch commands

[hedgehog1029]

With external modpack formats - I think the idea would be to effectively "build" the external format directly into the SKCraft pack format, rather than mapping it into the filesystem-based structure that the regular launcher-builder expects as input.

[Merith-TK]

Ya know, yeah that would be an idea, the ability to "import" external modpacks into the modpack creator, rather than supporting external modpack formats directly within the launcher