chore: declare the existing design index LRU dependency

Author: Bill Leoutsakos

bun.lock

@@ -175,6 +175,7 @@
     "json-schema-to-typescript": "15.0.4",
     "jsonc-parser": "3.3.1",
     "lint-staged": "16.0.0",
+    "lru-cache": "11.3.6",
     "opentype.js": "1.3.4",
     "parse5": "7.3.0",
     "postcss": "8.5.26",