chore: keep @runfusion/fusion and runfusion.ai npm versions in sync

- Add `["@runfusion/fusion", "runfusion.ai"]` to changesets `fixed` so
  future changesets bump both packages to the same version number.
- Catch up `runfusion.ai` from 0.0.8 to 0.1.1 so the fixed group starts
  from an aligned baseline; changelog entry notes the rationale.

No functional change to the alias package (`index.js` is unchanged).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.changeset/config.json

@@ -2,7 +2,7 @@
   "$schema": "https://unpkg.com/@changesets/config@3.1.1/schema.json",
   "changelog": "@changesets/cli/changelog",
   "commit": false,
-  "fixed": [],
+  "fixed": [["@runfusion/fusion", "runfusion.ai"]],
   "linked": [],
   "access": "public",
   "baseBranch": "main",