fix(agent-core): handle ripgrep cross-device install

[kermanx]

Related Issue

Resolves #111

Problem

When ripgrep is not available on PATH, the automatic bootstrap extracts rg under the system temporary directory and then installs it under the Kimi Code home directory. A direct rename fails with EXDEV when those directories are on different filesystems.

What changed

Copy the extracted Unix ripgrep binary into a temporary install directory under the target bin directory, apply executable permissions there, then rename it into the final cache path on the same filesystem. This avoids cross-device rename failures while keeping the final cache path from exposing a partial binary.

Added a patch changeset for the agent-core change that enters the CLI bundle.

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. Existing rg-locator tests were run; no new test was added for this small filesystem install-path change.
• Ran gen-changesets skill, or this PR needs no changeset.
• Ran gen-docs skill, or this PR needs no doc update.

[changeset-bot]

🦋 Changeset detected

Latest commit: 0a77da7

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

This PR includes changesets to release 2 packages

Name	Type
@moonshot-ai/agent-core	Patch
@moonshot-ai/kimi-code	Patch

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[pkg-pr-new]

pnpm dlx https://pkg.pr.new/@moonshot-ai/kimi-code@0a77da7

npx https://pkg.pr.new/@moonshot-ai/kimi-code@0a77da7

commit: 0a77da7

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