Add 9 new models across 3 new providers (NVIDIA, Z.AI) and expanded
coverage for existing providers (Mistral, MiniMax):

- NVIDIA Nemotron Super 3 120B, Nemotron Nano 3 30B
- Mistral Devstral 2 123B, Ministral 14B
- MiniMax M2.1, M2.5
- Z.AI GLM 5, GLM 4.7, GLM 4.7 Flash

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)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Closes #ISSUE

Release Notes:

- bedrock: Added 9 new models across 3 new providers (NVIDIA, Z.AI) and
expanded coverage for existing providers (Mistral, MiniMax)