add shareable stylelint config

Author: szaleq

config/.stylelintrc.json

@@ -1,3 +1,3 @@
 {
-	"extends": "stylelint-config-wordpress/scss"
+	"extends": "@micropackage/scripts/stylelint-config"
 }

stylelint-config.js

@@ -0,0 +1,10 @@
+module.exports = {
+	extends: [
+		'stylelint-config-recommended',
+		'stylelint-config-recommended-scss',
+	],
+	plugins: ['stylelint-order'],
+	rules: {
+		'order/order': ['custom-properties', 'declarations', 'rules'],
+	},
+};