Expand GoDaddy toolkit capabilities

[wcole1-godaddy]

This pull request expands the GoDaddy AI Toolkit to include Domains CLI capabilities alongside the existing Commerce skills. It updates documentation and plugin manifests to reflect the new Domains features, clarifies skill structure and host integration, and adds a comprehensive developer platform skill map for future expansion. The most important changes are summarized below.

Domains CLI and Skill Expansion

• Updated all plugin and marketplace manifests (.claude-plugin/plugin.json, .claude-plugin/marketplace.json, .cursor-plugin/plugin.json, .cursor-plugin/marketplace.json, .codex-plugin/plugin.json) to include Domains CLI, DNS, and domains-related keywords, and revised descriptions to highlight Domains support. [1] [2] [3] [4] [5] [6] [7] [8]

Documentation and Developer Guidance

• Updated README.md to document the new gddy Domains CLI skill, clarify installation and host integration, and reference the new developer platform skill map. [1] [2] [3] [4]
• Added docs/developer-platform-skill-map.md, providing a page-by-page audit of the GoDaddy developer documentation, recommended skill structure, and implementation guidance for Domains, Hosting, Commerce, and platform apps.
• Updated docs/toolkit-plan.md to reflect the expanded target capability areas (Domains, Hosting, Commerce, platform apps) and clarify the plugin’s scope.

Enhanced Plugin Metadata and UX

• Improved plugin interface descriptions, long descriptions, and default prompts to mention Domains CLI and guide users on domain registration tasks. Updated website URLs to point to the developer portal.

These changes collectively position the toolkit for broader GoDaddy developer use cases, starting with robust Domains and Commerce support.