This does a couple of things:
- The `custom_levels` folder was renamed to `custom_assets` and contains
`levels`, `models` and `texture_replacements` folders for Jak 1, 2 and 3
in order to keep everything regarding custom stuff in one place.
- With this, texture replacements now use separate folders for all games
- A build actor tool was added that generates art groups for custom
actors
- Custom levels can now specify what custom models from the `models`
folder they want to import, this will add them to the level's FR3.
- A `test-zone-obs.gc` file was added, containing a `test-actor` process
that uses a custom model as an example.
The build actor tool is still very WIP, the joints and the default
animation are hardcoded, but it allows for importing any GLB file as a
merc model.
* wip
* learning about colors
* gltf node stuff working
* cleanup
* support textures
* bvh generation seems reasonable
* tree layout
* frag packer, untested and doesnt do real stripping yet
* temp
* working collide frags
* handle bad inputs better
* clean up
* format
* include
* another include
* reorganize for release build use
