Update koality-flexbox-grid for latest sass

.stylelintrc.js

@@ -0,0 +1,25 @@
+module.exports = {
+  extends: [
+    'stylelint-config-sass-guidelines'
+  ],
+  rules: {
+    // Allow @use instead of @import
+    'scss/no-global-function-names': null,
+    // Allow math.div() function
+    'scss/at-function-pattern': null,
+    // Allow nested selectors for flexbox grid utility classes
+    'max-nesting-depth': 5,
+    // Allow longer selector names for utility classes
+    'selector-max-compound-selectors': 5,
+    // Allow vendor prefixes for flex properties (for IE11 compatibility)
+    'property-no-vendor-prefix': null,
+    // Allow long lines for grid template areas (rule doesn't exist in stylelint)
+    // 'max-line-length': null,
+    // Allow important declarations for utility classes
+    'declaration-no-important': null,
+    // Allow double quotes for consistency with existing code
+    '@stylistic/string-quotes': null,
+    // Allow flexible indentation for generated code
+    '@stylistic/indentation': null
+  }
+};