Move flake8 config into a separate folder

Author: xhochy

.pre-commit-config.yaml

@@ -16,14 +16,14 @@ repos:
         files: \.pyx$
         types:
           - file
-        args: [--append-config=.flake8.cython]
+        args: [--append-config=flake8/cython.cfg]
     -   id: flake8
         name: flake8-pxd
         language: python_venv
         files: \.(pxd|pxi\.in)$
         types:
           - file
-        args: [--append-config=.flake8.cython-header]
+        args: [--append-config=flake8/cython-header.cfg]
 -   repo: https://github.com/pre-commit/mirrors-isort
     rev: v4.3.21
     hooks:

ci/code_checks.sh

@@ -66,11 +66,11 @@ if [[ -z "$CHECK" || "$CHECK" == "lint" ]]; then
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
     MSG='Linting .pyx code' ; echo $MSG
-    flake8 --format="$FLAKE8_FORMAT" pandas --append-config=.flake8.cython
+    flake8 --format="$FLAKE8_FORMAT" pandas --append-config=flake8/cython.cfg
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
     MSG='Linting .pxd and .pxi.in' ; echo $MSG
-    flake8 --format="$FLAKE8_FORMAT" pandas/_libs --append-config=.flake8.cython-header
+    flake8 --format="$FLAKE8_FORMAT" pandas/_libs --append-config=flake8/cython-header.cfg
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
     echo "flake8-rst --version"