Add UnoCSS Detection

src/technologies/u.json

@@ -773,6 +773,15 @@
     "saas": true,
     "website": "https://ulogin.ru"
   },
+  "UnoCSS": {
+    "cats": [
+      66
+    ],
+    "css": "--un-(?:rotate|translate|space-x|text-opacity|border-opacity)",
+    "description": "UnoCSS is instant on-demand Atomic CSS engine.",
+    "icon": "UnoCSS.svg",
+    "website": "https://uno.antfu.me/"
+  },
   "uPortal": {
     "cats": [
       21
@@ -820,4 +829,4 @@
     "website": "https://github.com/utterance/utterances",
     "xhr": "\\.utteranc\\.es"
   }
-}
+}