feat: initial github actions library structure

README.md

@@ -0,0 +1,50 @@
+# GitHub Actions Library
+
+![GitHub Actions](https://img.shields.io/badge/GitHub_Actions-2088FF?style=flat&logo=github-actions&logoColor=white)
+![License](https://img.shields.io/badge/License-MIT-blue)
+
+Reusable GitHub Actions workflows and composite actions for CI/CD pipelines.
+
+## Workflows
+
+```
+.github/workflows/
+├── docker-build.yml      # Build, scan, and push Docker images
+├── terraform-plan.yml    # Terraform plan with cost estimation
+├── k8s-deploy.yml        # Kubernetes deployment with ArgoCD
+├── security-scan.yml     # SAST, DAST, dependency scanning
+└── release.yml           # Semantic release automation
+```
+
+## Composite Actions
+
+```
+actions/
+├── docker-build/         # Multi-arch Docker build
+├── terraform-plan/       # Terraform plan with PR comments
+├── k8s-deploy/           # Kubernetes deployment
+└── security-scan/        # Trivy, Grype, CodeQL
+```
+
+## Usage
+
+```yaml
+jobs:
+  build:
+    uses: ghndrx/github-actions-library/.github/workflows/docker-build.yml@main
+    with:
+      image-name: myapp
+    secrets: inherit
+```
+
+## Features
+
+- ✅ Reusable workflows (DRY)
+- ✅ Matrix builds
+- ✅ Security scanning built-in
+- ✅ Caching optimization
+- ✅ OIDC authentication (no long-lived secrets)
+
+## License
+
+MIT