fix(code-tools): support custom provider & fix Windows Terminal Issue

[GeorgeDong32]

What this PR does

Before this PR:

• Code tools didn't support custom Anthropic and OpenAI-Response providers.
• Codex used different config handling and lacked a --config option.
• OpenAI Codex config parameters were incorrect.

After this PR:

• Add support for custom Anthropic and OpenAI-Response providers in code.
• Introduce and a --config option codex.
  Fix OpenAI Cod configuration parameter handling.

Fixes #12496,#12497

Why we need it and why it was done in this way

The following tradeoffs were made:

• Ensures broader provider compatibility while keeping config handling explicit via --config.

The following alternatives were considered:

• Inline config changes instead of adding --config, but --config keeps usage clearer.

Links to places where the discussion took place:

Breaking changes

If this PR introduces breaking changes, please describe the changes and the impact on users.

• None expected; changes are backward-compatible config and provider support enhancements.

Special notes for your reviewer

• Verify custom provider flows for Anthropic and OpenAI-Response.
• Check codex --config behavior and OpenAI Codex parameter correctness.

Checklist

• PR: The PR description is expressive enough and will help future contributors
• Code: Write code that humans can understand and keep it simple
• Refactor: Left the code cleaner than found it
• Upgrade: Impact on upgrade flows considered if required
• Documentation: User-guide update considered if required

Release note

Support custom Anthropic and OpenAI-Response providers for code tools; add --config option to codex; fix OpenAI Codex config parameters.