chore: update stylelint rules to extend standard CSS rules

Author: dustin-jw

.stylelintrc.json

@@ -1,7 +1,24 @@
 {
-  "extends": "stylelint-config-standard-scss",
+  "extends": [
+    "stylelint-config-standard",
+    "stylelint-config-standard-scss"
+  ],
   "rules": {
-    "selector-class-pattern": null,
-    "media-feature-range-notation": "prefix"
+    "selector-class-pattern": [
+      "^(?:[a-z][a-z0-9]*(?:-[a-z0-9]+)*(?:__[a-z0-9]+(?:-[a-z0-9]+)*)?(?:--[a-z0-9]+(?:-[a-z0-9]+)*)?)?(?:\\[.+\\])?$",
+      {
+        "message": "Expected property name to be in BEM format",
+        "resolveNestedSelectors": true
+      }
+    ],
+    "media-feature-range-notation": "prefix",
+    "max-nesting-depth": [
+      4,
+      {
+        "ignore": [
+          "blockless-at-rules"
+        ]
+      }
+    ]
   }
-}
+}