feat: add GitHub Copilot CLI platform support

[JiaqiZhang-Dev]

The skill supports GitHub Copilot in VS Code (.github/prompts/) but not the GitHub Copilot CLI. This adds copilot-cli as a new platform type, installing to .github/skills/ui-ux-pro-max/.

Changes

• Platform config: New copilot-cli.json in both src/ui-ux-pro-max/templates/platforms/ and cli/assets/templates/platforms/
• Type registration (cli/src/types/index.ts): Added copilot-cli to AIType, AI_TYPES, and AI_FOLDERS (maps to ['.github'])
• Detection (cli/src/utils/detect.ts): Auto-detects via .github/copilot-instructions.md
• Template mapping (cli/src/utils/template.ts): Added AI_TO_PLATFORM entry
• README: Added to install examples and supported platforms list

uipro init --ai copilot-cli   # GitHub Copilot CLI

Tests

[mrgoonie]

Summary: Copilot CLI support is a useful platform addition and the PR updates both canonical src/ templates and packaged CLI assets, but the proposed install path is not aligned with GitHub Copilot custom instruction conventions and will likely not be auto-loaded by Copilot.

Risk level: Medium

Mandatory gates:

• Duplicate/prior implementation: overlap checked — #328 covers VS Code Copilot prompt-file behavior, but no existing Copilot CLI platform PR implements this copilot-cli target.
• Project standards: issue found — source and CLI asset copies are both added, but platform detection/install semantics need to match the target assistant.
• Strategic necessity: clear value — first-class Copilot CLI support would reduce manual install friction for GitHub Copilot users.
• CI/checks: locally blocked — this environment has no bun, so npm --prefix cli run build cannot complete; the screenshot only proves a skill-like command is loaded, not that GitHub Copilot CLI will consume .github/skills.

Findings:

• Important: The new platform installs SKILL.md under .github/skills/ui-ux-pro-max/, but the detection logic keys off .github/copilot-instructions.md, and the repository's existing Copilot support uses .github/prompts/. I don't see evidence in the PR that GitHub Copilot CLI auto-loads arbitrary .github/skills/*/SKILL.md directories. Please verify the documented Copilot CLI/custom-instructions location and adjust the platform config accordingly, or include a link/test showing .github/skills/ui-ux-pro-max/SKILL.md is actually discovered by Copilot CLI.
• Important: detectAIType() will detect both copilot and copilot-cli whenever .github/copilot-instructions.md exists, because it first pushes copilot for any .github directory and then pushes copilot-cli. That makes the suggested type become all, so a Copilot CLI project can get all-platform install behavior instead of the specific copilot-cli target. Please make the detection precedence unambiguous.

Verdict: REQUEST_CHANGES