move all linter config to the root (#9830)

This reduces duplication, symlinks, and makes the configurations
available by default for the linting tools.

.flake8

@@ -0,0 +1,4 @@
+[flake8]
+max-line-length = 120
+exclude = ./typings/**/*
+ignore = E203,W503

.github/workflows/super-linter.yml

@@ -55,7 +55,12 @@ jobs:
         env:
           VALIDATE_ALL_CODEBASE: true
           DEFAULT_BRANCH: main
-          LINTER_RULES_PATH: .github/linters
+          LINTER_RULES_PATH: .
+          MARKDOWN_CONFIG_FILE: .markdown-lint.yml
+          PYTHON_BLACK_CONFIG_FILE: pyproject.toml
+          PYTHON_FLAKE8_CONFIG_FILE: .flake8
+          PYTHON_ISORT_CONFIG_FILE: .isort.cfg
+          PYTHON_PYLINT_CONFIG_FILE: pylintrc
           VALIDATE_BASH: true
           VALIDATE_CSS: true
           VALIDATE_DOCKER: true
@@ -65,7 +70,6 @@ jobs:
           VALIDATE_JSON: true
           VALIDATE_MD: true
           VALIDATE_POWERSHELL: true
-          VALIDATE_PYTHON: true
           VALIDATE_PYTHON_PYLINT: true
           VALIDATE_PYTHON_FLAKE8: true
           VALIDATE_PYTHON_BLACK: true

.isort.cfg

@@ -0,0 +1,20 @@
+[settings]
+profile=
+
+; vertical hanging indent mode also used in black configuration
+multi_line_output = 3
+
+; necessary because black expect the trailing comma
+include_trailing_comma = true
+
+; black compatibility
+force_grid_wrap = 0
+
+; black compatibility
+use_parentheses = True
+
+; black compatibility
+ensure_newline_before_comments = True
+
+; we chose 120 as line length
+line_length = 120