feat(skills): Import Tier 1 priority skills

[aRustyDev]

Summary

Import high-priority skills from external registries, renamed to follow the naming convention.

Skills Imported

Original	Imported As	Source
mcp-builder	llm-mcp-builder-dev	anthropics/skills
systematic-debugging	method-debugging-systematic-eng	obra/superpowers
rag-implementation	llm-rag-patterns-dev	wshobson/agents
terraform-module-library	iac-terraform-modules-eng	wshobson/agents
prometheus-configuration	o11y-metrics-prometheus-ops	wshobson/agents
context-fundamentals	meta-context-engineering-dev	muratcankoylan

Categories Covered

• llm: MCP server development, RAG patterns
• method: Systematic debugging methodology
• iac: Terraform modules for AWS/Azure/GCP
• o11y: Prometheus metrics and alerting
• meta: Context engineering fundamentals

Related

Part of skill organization project (Phase 2: Priority Imports)
Depends on #35 (infrastructure) and #37 (manifest)