assets are distributed by packs, which can come in archived or folder form (for development purposes)

one pack by the name of 'data' is always assumed to be present alongside game executable root,
whether in folder /data/ or /data.btw file, where precedence is taking over /data/

root 'data' should be used to point to other dependency packs in /packs/data.toml file

---
[[deps]]
source = "../../common-data" # where does it come from, might be an url
name = "common-data"         # should be globally unique
---

they're mounted to / in the virtual file system by default, if same files are present in multiple packs,
only the one loaded first is visible
