add instructions to add skills using skills.sh

[ganeshdipdumbare]

No description provided.

[Copilot]

Pull request overview

Adds README installation instructions for using Upsun skills with OpenCode (which currently lacks a plugin marketplace), and updates the “Skills only (manual)” section to copy the full skills directory.

Changes:

• Document manual “Global” and “Project-local” installation steps for OpenCode skills.
• Update manual skills-only installation guidance to copy plugins/upsun/skills/ (instead of a single skill path).
• Cross-link the manual section to the new OpenCode section.

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[pjcdawkins]

We could mention this manual clone + copy mechanism, but it has no lifecycle management (no updates), and we need to update our skill with plenty of upcoming plans. Could we recommend and publish it on https://skills.sh instead? It seems that should work for many CLI agents.

[ganeshdipdumbare]

for many CLI agents.

Ah sure. I was gonna ask you about it as its 3rd party tool so.
I will add instructions in README.md for the same then.

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 2 comments.

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