Use dedicated OpenUI skill source

[zahlekhan]

Summary

• install the OpenUI agent skill from thesysdev/skills
• keep using the standard npx skills package
• retain the legacy skills/openui copy for already-published CLI versions and manual installation
• bump @openuidev/cli from 0.1.7 to 0.1.8
• update the README and MCP documentation to show the dedicated source

Why

The previous command installed from the full thesysdev/openui repository, causing the skills CLI to shallow-clone the large application repository. The dedicated skills repository keeps the same standard install flow while reducing the source checkout dramatically.

Impact

The 0.1.8 CLI installs the same openui skill from the dedicated repository. The legacy copy remains in this repository so older published CLI versions that still resolve the OpenUI repository do not break. A real install from the shorthand source completed successfully in about 3.8 seconds.

Validation

• pnpm --filter @openuidev/cli lint:check
• pnpm --filter @openuidev/cli format:check
• pnpm --filter @openuidev/cli build
• git diff --check
• npx -y skills add thesysdev/skills --skill openui -y
• built-CLI scaffolds for both openui-self-hosted and openui-cloud with --skill --no-install
• verified both generated projects contain .agents/skills/openui/SKILL.md and the referenced skill files
• verified the built CLI reports version 0.1.8