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 | 1s | 1s | 2s |
| Eval | 2s | 2m15s | 2m15s | 2m18s |
| Build | 23s | 2m57s | 34s | 57s |
| Test | - | - | - | - |
| Deploy | - | - | - | - |
| Suite | 0s | 5m15s | 2m17s | 2m18s |