Add `kubernetes-specialist` skill

[niravpatel27]

Summary

Add a kubernetes-specialist skill that helps deploy and manage Kubernetes workloads — covering Helm charts, resource configs, debugging pods, and scaling strategies.

What this skill should do

• Help write and review Kubernetes manifests and Helm charts
• Guide on resource requests/limits and HPA configuration
• Help debug failing pods (CrashLoopBackOff, OOMKilled, etc.)
• Suggest scaling and availability patterns
• Review cluster configs for common misconfigurations

Reference

See existing skills like lfx-backend-builder/SKILL.md for pattern and format.
Each skill lives in its own directory with a SKILL.md file and markdown instructions.

Acceptance Criteria

• kubernetes-specialist/SKILL.md exists with correct frontmatter
• Skill gives useful guidance on a sample Kubernetes deployment task