chore(renovate): hold typescript below 7

TypeScript 7's npm package exports no compiler API, so vue-tsc crashes
(ERR_PACKAGE_PATH_NOT_EXPORTED './lib/tsc') and typescript-eslint 8.71.0
caps its peer range at <6.1.0. Supersedes #4926.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

renovate.json

@@ -25,6 +25,12 @@
       "groupName": "valkey",
       "allowedVersions": "<9.1"
     },
+    {
+      "description": "TypeScript 7 ships no JavaScript compiler API, which vue-tsc, typescript-eslint and vue-component-meta load. Raise this bound once they support it.",
+      "matchManagers": ["npm"],
+      "matchPackageNames": ["typescript"],
+      "allowedVersions": "<7"
+    },
     {
       "matchDatasources": ["docker"],
       "matchPackageNames": ["postgres"],