psh: implement `route` management tool #914

All 6 745 tests pass, 715 skipped in 37m 58s

7 460 tests ±0 6 745 ✅ ±0 37m 58s ⏱️ - 1m 3s
420 suites ±0 715 💤 ±0
1 files ±0 0 ❌ ±0

Results for commit 1f4a673. ± Comparison against earlier commit be883de.