Add CSS Pattern helper for background patterns

Author: stefanjudis

helpers/css-pattern.json

@@ -0,0 +1,12 @@
+{
+  "name": "CSS Pattern",
+  "desc": "Find CSS background patterns.",
+  "url": "https://css-pattern.com/",
+  "tags": [
+    "CSS"
+  ],
+  "maintainers": [
+    "Afif13"
+  ],
+  "addedAt": "2025-08-31"
+}