[4.x] Mod Hooks: Investigate if we can "pre hook" scripts with the self setup.

[KANAjetzt]

Basically what the export plugin does but on the setup stage of a self setup.
Maybe by creating a new .pck with GDRETools?

Without this feature we can't hook into preloaded scripts.

[Qubus0]

so we'd

1. --script self setup
2. process all preloaded scripts
3. create a pack with those
4. patch the processed pack into the game, and the mod loader while we're at it
   • with an outside tool, since we can't do it during runtime because preloads always go first
   • options are gdre and deltapatching i assume
5. replace the pck with the new one?
6. load mods like usual