[Feature]: Add Ollama Cloud provider

[doggy8088]

Before submitting

• I searched existing issues and did not find a duplicate.
• I am describing a concrete problem or use case, not just a vague idea.

Area

Not sure

Problem or use case

I want to use Ollama Cloud as an LLM provider for t3code.

Proposed solution

Add it.

Why this matters

It provider lots of excellent open-weight models.

Smallest useful scope

N/A

Alternatives considered

No response

Risks or tradeoffs

No response

Examples or references

No response

Contribution

• I would be open to helping implement this.