nipanel: Type check with Pyright in addition to mypy #180

All 80 tests pass in 20s

10 files + 10 10 suites +10 20s ⏱️ +20s
80 tests + 80 80 ✅ + 80 0 💤 ±0 0 ❌ ±0
770 runs +770 770 ✅ +770 0 💤 ±0 0 ❌ ±0

Results for commit 1c3dd1e. ± Comparison against earlier commit 58ce7a8.