Wrap code review messages in NOTE callout block

[Paveltarno]

Description

This PR adds a new site browse command to open the published site in a browser, adds the claude-code-plugins subtree containing various plugin tools and workflows, and improves code review message formatting by wrapping messages in GitHub's NOTE callout blocks for better visual quality and readability.

Related Issue

None

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Other (please describe):

Changes Made

• Added new site browse command to open the published site URL in the default browser (src/cli/commands/site/browse.ts:1)
• Added getSiteUrl() utility function to fetch published site URL from API (src/cli/utils/urls.ts:29)
• Refactored site commands structure by extracting deploy command and creating site command index (src/cli/commands/site/index.ts:1)
• Added claude-code-plugins subtree containing plugins for code review, feature development, commit commands, and various GitHub workflows
• Updated code-review plugin to format review messages with GitHub NOTE callout blocks (claude-code-plugins/plugins/code-review/commands/code-review.md:62)
• Updated GitHub workflow to reference local plugin path instead of marketplace

Testing

• I have tested these changes locally
• I have added/updated tests as needed
• All tests pass (npm test)

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• I have updated AGENTS.md if I made architectural changes

Additional Notes

The site browse command includes a CI check to avoid opening browsers in CI environments. The command requires authentication to access the published site URL from the API. The claude-code-plugins subtree adds extensive plugin infrastructure including marketplace metadata, GitHub workflows, and various development tools.

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_{🤖 Generated by Claude | 2026-02-01 19:54 UTC}

[github-actions]

🚀 Package Preview Available!

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Install this PR's preview build with npm:

npm i @base44-preview/cli@0.0.26-pr.171.987dd70

Prefer not to change any import paths? Install using npm alias so your code still imports base44:

npm i "base44@npm:@base44-preview/cli@0.0.26-pr.171.987dd70"

Or add it to your package.json dependencies:

{
  "dependencies": {
    "base44": "npm:@base44-preview/cli@0.0.26-pr.171.987dd70"
  }
}

• 📦 Preview Package: @base44-preview/cli@0.0.26-pr.171.987dd70
• 🔗 View this commit on GitHub

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_{Preview published to npm registry — try new features instantly!}

[Paveltarno]

Closing - recreated from correct base branch in #172