Add OpenCode Go MiMo-V2.5 subscription params

[guillaumegay13]

Summary

• Add an opencode-go subscription catalog row for mimo-v2.5.
• Include the scalar OpenAI-compatible request knobs documented for MiMo: max_completion_tokens, stop, temperature, top_p, frequency_penalty, and presence_penalty.
• Leave transport, tool-calling, multimodal, and runtime message fields out of MPS scope.

Sources

• OpenCode Go docs: https://opencode.ai/docs/go/
• MiMo OpenAI-compatible API docs: https://www.mimo-v2.com/docs/api/chat/openai-api

Validation

• npm ci
• npm run validate
• npm test
• npm run typecheck
• npm run build
• npm run guard:params
• npm run lint
• npx prettier --check models/opencode-go/mimo-v2.5-subscription.yaml
• curl -fsSL https://opencode.ai/zen/go/v1/models | jq -r '.data[]?.id // empty' | rg '^mimo-v2\\.5$'\n\nLive completion smoke was not run because there is no OpenCode Go subscription token configured in this environment.\n\nCloses opencode-go/opencode-go/mimo-v2.5: parameter coverage #25

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