Two model updates:
- **Free**: Big Pickle now has a max output tokens of 32k as per
https://github.com/anomalyco/models.dev/commit/49991c8f8f98eacb0ad66c7fad0e3b12a7465246
- **Go**: added Qwen3.7 Max as per
https://github.com/anomalyco/models.dev/commit/4f1d5c511ae983024385e03f089b8e21e1eb4548
and
https://github.com/anomalyco/opencode/commit/1554a5a82e32c30d2665ed6b59ebd33f79f9b9e3#diff-a7ee7cf35b40335095a44cfaac16041313c36322cd14544ddad0289ce69131ab.
Tested this successfully by running a simple "_rename this variable for
me. add a function. delete the function_" test

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- OpenCode: updated models (added Qwen3.7 Max, updated Big Pickle token
counts)