zeta2: Support experimental 1120-seedcoder model (#43411)
1. Introduce a common `PromptFormatter` trait
2. Let models define their generation params.
3. Add support for the experimental 1120-seedcoder prompt format
Release Notes:
- N/A
ea7568ceb3Oleksiy Syvokon committed on 11/24/2025, 4:27:11 PM· committed by GitHubparente6b42a2