Detect agent definitions in more places as well as skills

[withinfocus]

🎟️ Tracking

More testing on #15.

📔 Objective

The workflow now correctly understands the Claude Code plugin marketplace structure where:

• Agents are in subdirectories: plugins/{plugin}/agents/{agent-name}/AGENT.md
• Skills are in subdirectories: plugins/{plugin}/skills/{skill-name}/SKILL.md
• Hooks are at plugin root: plugins/{plugin}/.claude-plugin/hooks.json

and the validator will now analyze skills as well.

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions]

Checkmarx One – Scan Summary & Details – dd418ca9-3ee7-4227-b580-a5603f9795d3

Great job! No new security vulnerabilities introduced in this pull request