feat(cli): add doctor command for config validation

[liruifengv]

Related Issue

No linked issue; this adds a small CLI diagnostic command requested during configuration validation work.

Problem

Users need a lightweight way to validate config.toml and tui.toml, including candidate files, without launching the TUI or modifying configuration files.

What changed

• add kimi doctor, kimi doctor config [path], and kimi doctor tui [path]
• reuse the existing config and TUI TOML parsers so diagnostics match runtime validation
• document the new command in English and Chinese reference docs

Checklist

• I have read the CONTRIBUTING document.
• I have linked a related issue, or explained the problem above.
• I have added tests that prove my feature works.
• Ran gen-changesets skill, or this PR needs no changeset.
• Ran gen-docs skill, or this PR needs no doc update.

Validation

• pnpm exec vitest run apps/kimi-code/test/cli/doctor.test.ts apps/kimi-code/test/cli/options.test.ts packages/node-sdk/test/config.test.ts apps/kimi-code/test/tui/config.test.ts
• pnpm --filter @moonshot-ai/kimi-code run typecheck
• pnpm --filter @moonshot-ai/kimi-code-sdk run typecheck
• pnpm exec oxlint --type-aware apps/kimi-code/src/cli/sub/doctor.ts apps/kimi-code/src/cli/commands.ts packages/node-sdk/src/index.ts apps/kimi-code/test/cli/doctor.test.ts apps/kimi-code/test/cli/options.test.ts
• pnpm -C docs run build
• git diff --check

[changeset-bot]

🦋 Changeset detected

Latest commit: 1625ac5

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@moonshot-ai/kimi-code	Minor
@moonshot-ai/kimi-code-sdk	Minor
@moonshot-ai/acp-adapter	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[pkg-pr-new]

pnpm dlx https://pkg.pr.new/@moonshot-ai/kimi-code@1625ac5

npx https://pkg.pr.new/@moonshot-ai/kimi-code@1625ac5

commit: 1625ac5