build: replace black and isort with ruff

ruff format keeps black's style at the same line length, and ruff
check covers import sorting plus pycodestyle and pyflakes. Three
comments and a test regex are wrapped to fit 79 columns.

pqcli/mechanic.py

@@ -923,7 +923,8 @@ def monster_task(
         result = monster.name
         lev = monster.level
     else:
-        # pick the monster out of so many random ones closest to the level we want
+        # pick the monster out of so many random ones closest to the level
+        # we want
         monster = unnamed_monster(data, level, iterations=5)
         result = monster.name
         lev = monster.level