docs: add copilot-instructions.md for iAiFy governance

Author: ashsolei

.github/copilot-instructions.md

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+# Copilot Instructions — OpenShell
+
+## Project
+
+- **Name**: OpenShell
+- **Organization**: AiFeatures
+- **Enterprise**: iAiFy
+- **Description**: OpenShell is the safe, private runtime for autonomous AI agents.
+
+## Fork Status
+
+This is a fork of NVIDIA/OpenShell. Do not contribute back upstream.
+Local customizations are preserved in the main branch.
+Upstream sync is managed via Ai-road-4-You/fork-sync.
+
+## Conventions
+
+- Use kebab-case for file and directory names
+- Use conventional commits (feat:, fix:, chore:, docs:, refactor:, test:)
+- All PRs require review before merge
+- Branch from main, merge back to main
+
+## Shared Infrastructure
+
+- Reusable workflows: Ai-road-4-You/enterprise-ci-cd@v1
+- Composite actions: Ai-road-4-You/github-actions@v1
+- Governance standards: Ai-road-4-You/governance
+
+## Quality Standards
+
+- Run lint and tests before submitting PRs
+- Keep dependencies updated via Dependabot
+- No hardcoded secrets — use GitHub Secrets or environment variables
+- Follow OWASP Top 10 security practices