docs: add Autohand Code skills setup

[igorcosta]

Summary

Adds Autohand Code setup notes for the bundled Google Workspace agent skills.

The new README details show users where Autohand Code can read skills from:

• ~/.autohand/skills/ for global installs
• .autohand/skills/ for workspace-local installs

It also keeps the wording conservative by recommending direct copy or symlink setup until these skills are available through the Autohand skill catalog.

Changes

• Add an Autohand Code setup details block under the existing Agent Skills section.
• Add a changeset for the docs-only update.

Validation

• git diff --check
• cargo test
• cargo clippy -- -D warnings currently fails on this local Rust 1.88.0 toolchain due to pre-existing clippy::uninlined_format_args warnings in crates/google-workspace/src/client.rs and crates/google-workspace/src/validate.rs. This PR only changes README.md and adds a changeset.

[changeset-bot]

🦋 Changeset detected

Latest commit: c99df0d

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

This PR includes changesets to release 1 package

Name	Type
@googleworkspace/cli	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

[google-cla]

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request improves the developer experience by providing clear instructions for setting up Autohand Code with bundled Google Workspace agent skills. It outlines the necessary directory structures and provides practical commands for symlinking or copying skills, ensuring users can effectively integrate these tools into their development environment.

Highlights

• Documentation Update: Added a new 'Autohand Code setup' section to the README to guide users on configuring bundled agent skills.
• Configuration Paths: Defined standard paths for global (~/.autohand/skills/) and workspace-local (.autohand/skills/) skill installations.
• Changeset Inclusion: Added a new changeset file to track the documentation update.

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[gemini-code-assist]

Code Review

This pull request adds documentation for setting up Autohand Code with bundled agent skills, including a new changeset file and a detailed setup guide in the README.md. There are no review comments, so I have no feedback to provide.