chore(pyproject): install isort with dev dependencies

configure isort to use the black profile, with some overrides from
the Django profile and match our common line-length

Author: thekaveman

pyproject.toml

@@ -32,6 +32,7 @@ dev = [
     "black",
     "djlint",
     "flake8",
+    "isort",
     "pre-commit",
     "setuptools_scm>=8"
 ]
@@ -77,6 +78,12 @@ profile = "django"
 preserve_blank_lines = true
 use_gitignore = true
 
+[tool.isort]
+profile = "black"
+combine_as_imports = true
+line_length = 127
+skip_gitignore = true
+
 [tool.pyright]
 include = ["benefits", "tests/pytest"]
 typeCheckingMode = "off"