Support OpenCode Go/Zen please, it provides DeepSeek-V4 as well.

[seanthefuturegorilla]

Problem

Now DeepSeek-TUI does not support OpenCode Go/Zen as DeepSeek provider

Proposed solution

Support OpenCode Go/Zen, they provides DeepSeek-V4 as well, and it is very cheap.

Alternatives considered

Additional context

[Hiyajomaho-num9]

The DeepSeek API in opencode-go actually uses the OpenAI Chat compatibility mode and offers native support.

[diegovskytl]

opencode go also provides access for other open models codewhale supports. having it as a canonic provider would be very useful :) i guess related to #2478