Add weekly blog topic radar skill

[colindembovsky]

Summary

• add a weekly topic-radar skill for DevOps and agentic-engineering news
• rank defensible theses through verified evidence packets, hard eligibility gates, archive comparison, open-thread fit, and weighted scoring
• add progressive references for topic territories, signal-to-thesis patterns, source reliability, archive theses, and lean editorial styling
• support explicit drafting of a selected topic while keeping weekly scans topic-first

Invocation

Ask for weekly blog ideas, what to write next, content planning, or a draft from a selected suggestion. The skill defaults to a 7-day event window with 90-day trend context and reports evidence confidence separately from search coverage.

Validation

• skill structure validation
• requirement checks for workflow, gates, scoring, degradation, and references
• Jekyll build