Add .githubification/README.md: GitHub infrastructure feasibility assessment

[Copilot]

Detailed assessment of migrating NeMo Agent Toolkit's functionality to a GitHub-infrastructured application using GitHub Actions as the primary compute/orchestration layer.

Coverage

• ✅ Fully feasible — CI/CD (already in place), scheduled evaluations, prompt optimization, docs→GitHub Pages, release/PyPI automation, security scanning, headless agent smoke tests
• ⚠️ Partially feasible — Integration testing with 12+ service containers (needs larger runners), MCP/A2A testing (non-production), fine-tuning orchestration (API-side only), data flywheel batch processing
• ❌ Not feasible — Production agent serving (no inbound routing, ephemeral runners), real-time observability, interactive chat UI, local/GPU model inference

Includes

• Current architecture mapping (FastAPI, 30+ packages, LLM providers, databases, observability)
• Proposed 3-tier architecture: fully-on-GitHub → GitHub-as-orchestrator → external infra deployed by GitHub Actions
• GitHub runner resource constraint analysis
• Cost estimation (~$75/mo for typical active development)
• Phased migration plan

Conclusion: ~60–70% of operational needs map cleanly to GitHub Actions; the remainder (persistent serving, GPU, real-time monitoring) requires external compute but can be deployed/managed by GitHub Actions as the control plane.

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