Use uv as Nox backend and several related improvements (#476)
#648
| Job | Run time |
|---|---|
| 2m 26s | |
| 2m 20s | |
| 2m 18s | |
| 2m 18s | |
| 2m 42s | |
| 2m 22s | |
| 4m 10s | |
| 2m 32s | |
| 5m 0s | |
| 1m 54s | |
| 4m 12s | |
| 1m 40s | |
| 1m 30s | |
| 4m 8s | |
| 4m 50s | |
| 44m 22s |