Add config for ruff check

Author: linsword13

pyproject.toml

@@ -119,3 +119,18 @@ allow_redefinition = true
 # Only enable ramble modules
 module = "ramble.*"
 ignore_errors = false
+
+# TODO: Add ruff into `ramble style` once it reaches v1.
+# For now, the ruff check can be invoked manually with `ruff check`.
+[tool.ruff]
+extend-include = ["bin/ramble"]
+extend-exclude = [
+  "lib/ramble/external",
+  "lib/ramble/spack",
+  "lib/ramble/llnl",
+]
+
+[tool.ruff.lint]
+# The F and E ignores here are already checked by flake8, and B905 requires Python 3.9 or up.
+ignore = ["B905", "F405", "F403", "E402"]
+extend-select = ["B"]

share/ramble/qa/flake8_formatter.py

@@ -4,7 +4,6 @@
 
 import pycodestyle
 from flake8.formatting.default import Pylint
-from flake8.style_guide import Violation
 
 #: This is a dict that maps:
 #:  filename pattern ->