add stylelint

Author: adenvt

.stylelintrc

@@ -0,0 +1,16 @@
+{
+  "extends": [
+    "stylelint-config-sass-guidelines"
+  ],
+  "plugins": [
+    "stylelint-scss"
+  ],
+  "rules": {
+    "max-nesting-depth": 7,
+    "no-descending-specificity": null,
+    "selector-max-compound-selectors": null,
+    "property-no-vendor-prefix": null,
+    "scss/at-extend-no-missing-placeholder": null,
+    "selector-no-qualifying-type": null
+  }
+}