feat: add using as typescript keyword

https://www.totaltypescript.com/typescript-5-2-new-keyword-using

deno recently add support for this 6dc8682b9a (you can test with deno upgrade --canary)

runtime/queries/_typescript/highlights.scm

@@ -89,6 +89,7 @@
   "namespace"
   "override"
   "satisfies"
+  "using"
 ] @keyword
 
 [