feat(agent-skills): Add --skills command to install Sentry agent skills

[codyde]

Summary

This PR adds a new wizard feature that installs Sentry agent skills for various AI coding assistants.

Supported Editors

• Claude Code (.claude/skills/)
• OpenAI Codex (.codex/skills/)
• OpenCode (.opencode/skill/)
• Cursor (.cursor/skills/)
• GitHub Copilot (.github/skills/)
• Factory Droid (.factory/skills/)

Features

• Interactive mode with scope and editor selection prompts
• Headless mode: --skills claude-code opencode
• Project-scoped (default) or user-scoped installation: --scope user
• Smart update logic: updates Sentry skills, preserves user-created skills
• Downloads skills from getsentry/sentry-agent-skills GitHub releases

Usage

# Interactive mode
npx @sentry/wizard --skills

# Headless mode - specify editors
npx @sentry/wizard --skills claude-code cursor

# Install to user profile instead of project
npx @sentry/wizard --skills claude-code --scope user

Changes

• bin.ts - Added --skills and --scope CLI arguments
• src/agent-skills/agent-skills-wizard.ts - Main wizard implementation
• src/agent-skills/editor-configs.ts - Editor configuration and path helpers
• src/run.ts - Route to agent skills wizard when --skills flag is present

Testing

• Manual testing with each supported editor
• Unit tests (TODO)
• E2E tests (TODO)

[github-actions]

Semver Impact of This PR

⚪ None (no version bump detected)

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Features

• (agent-skills) Add --skills command to install Sentry agent skills by codyde in #1187

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