chore(renovate): hold typescript on 5.x for svelte-check

renovate.jsonc

@@ -1,4 +1,12 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": ["local>templates/renovate"]
+  "extends": ["local>templates/renovate"],
+  "packageRules": [
+    {
+      // TypeScript 7 is the Go port: it ships no JS compiler API, so svelte-check
+      // crashes on it, and no svelte-check release supports it (peer: ^5 || ^6).
+      "matchPackageNames": ["typescript"],
+      "allowedVersions": "<6"
+    }
+  ]
 }