Update linters and add configuration for new tools

Upgraded flake8, introduced black, and blacken-docs in the pre-commit configuration. Added a new .flake8 file for custom flake8 settings. Removed the obsolete lint job from GitHub Actions build workflow.

.flake8

@@ -0,0 +1,8 @@
+[flake8]
+max-line-length = 119
+exclude =
+  .git,
+  __pycache__,
+  .venv,
+  build
+ignore = E101,E111,E114,E115,E116,E117,E12,E13,E2,E3,E401,E5,E70,W1,W2,W3,W5

.github/workflows/build.yml

@@ -13,8 +13,6 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - python: 3.x
-            toxenv: lint
           - python: 3.8
             toxenv: py38-django22
           - python: 3.9

.pre-commit-config.yaml

@@ -1,9 +1,18 @@
 repos:
-  - repo: https://gitlab.com/pycqa/flake8
-    rev: 3.8.4
-    hooks:
-      - id: flake8
-  - repo: https://github.com/PyCQA/isort
-    rev: 5.6.4
-    hooks:
-      - id: isort
+- repo: https://github.com/PyCQA/flake8
+  rev: 7.1.0
+  hooks:
+  - id: flake8
+- repo: https://github.com/psf/black
+  rev: 24.10.0
+  hooks:
+  - id: black
+- repo: https://github.com/asottile/blacken-docs
+  rev: 1.18.0
+  hooks:
+  - id: blacken-docs
+- repo: https://github.com/pycqa/isort
+  rev: 5.13.2
+  hooks:
+  - id: isort
+    args: ["--profile", "black", "--filter-files"]