Restructure `pathway-system` This does a lot of restructuring: - adds `pathway-compat-*` libs for multi-layer wrappers over `base`, `directory`, and `filepath`; - adds `variant`-based open sum types for recovering `IO` errors; and - has `pathway-system` depend on the new `pathway-compat-*` packages.
| Time to Start | Worker time | Duration | Time to finish | |
| Config | 0s | 2s | 2s | 3s |
| Eval | 3s | 2m31s | 2m31s | 2m35s |
| Build | 39s | 5m03s | 1m15s | 1m54s |
| Test | - | - | - | - |
| Deploy | - | - | - | - |
| Suite | 0s | 7m38s | 2m34s | 2m35s |