[common/hc] domOptimizer: fix linting errors

common/hellcooling/config/global.d.ts

@@ -0,0 +1,7 @@
+export {};
+
+declare global {
+  const hh: {
+    constants: Record<string, string> & { categories: Record<string, string> };
+  };
+}

common/hellcooling/config/tsconfig.json

@@ -14,5 +14,5 @@
     },
     "typeRoots": ["/Users/alyxia/Documents/gitrepos/hh3/types"]
   },
-  "include": ["./ext/**/*"]
+  "include": ["./ext/**/*", "./global.d.ts"]
 }