Add Autohand Code setup notes

[igorcosta]

Hi, thanks for maintaining this skills pack.

I noticed the Quick Start already covers several coding-agent harnesses. This adds a small Autohand Code section that follows the same collapsible style and points users to the verified Autohand skill locations:

• user-level: ~/.autohand/skills/
• project-level: .autohand/skills/
• catalog installs via autohand --skill-install

I kept this README-only and avoided claiming a direct registry install for this repo, since I only verified the generic Autohand catalog install flow from the current Autohand Code CLI docs.

Tests were not run because this is documentation-only.

[addyosmani]

Leaning against this one. We're keeping the core pack vendor-neutral, and a setup guide for a specific third-party product is a promotion-and-maintenance commitment I'm cautious about taking on. If Autohand reads the skills standard natively the way our other integrations do, the pack already works there without a bespoke guide. Happy to be corrected if it needs special wiring, but as setup-notes-for-a-product it's probably a pass.

[addyosmani]

Thanks, and I appreciate that you matched the existing collapsible style. I'm going to pass on this one though: the pack stays vendor-neutral, and a setup section for a specific commercial coding tool is a maintenance commitment to something we don't control. If Autohand reads the skills standard the way our native integrations do, it already works without a bespoke section. Closing, but no knock on the tool.