Use 'ruff format', instead of 'black'

Despite being the de facto standard in the community, let's switch from
the black formatter to the ruff formatter. The latter is mostly
compatible with the former but dozen times faster. So why use many tools
if you can use just one?

Since Holocron is a pet project and a great playground for me, let's how
far 'ruff format' can get.

pyproject.toml

@@ -72,13 +72,13 @@ scripts.run = "python -m pytest {args:-vv}"
 
 [tool.hatch.envs.lint]
 detached = true
-dependencies = ["black >= 23.10.1", "ruff >= 0.1.3"]
-scripts.check = ["ruff {args:.}", "black --check --diff {args:.}"]
-scripts.fmt = ["ruff --fix {args:.}", "black {args:.}"]
+dependencies = ["ruff >= 0.1.4"]
+scripts.check = ["ruff {args:.}", "ruff format --check --diff {args:.}"]
+scripts.fmt = ["ruff --fix {args:.}", "ruff format {args:.}"]
 
 [tool.ruff]
 select = ["F", "E", "W", "I", "S", "FBT", "B", "C4", "DTZ", "T10", "ISC", "RET", "SLF", "RUF"]
-ignore = ["S603", "S701", "B904"]
+ignore = ["S603", "S701", "B904", "ISC001"]
 
 [tool.ruff.isort]
 known-first-party = ["holocron"]