feat: add initial README.md for devops-infra organization (#68)

Co-authored-by: ChristophShyper <45788587+ChristophShyper@users.noreply.github.com>

Author: github-actions[bot]

profile/README.md

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+# devops-infra
+
+`devops-infra` is a platform-focused GitHub organization for reusable CI/CD automation, containerized infrastructure tooling, and repository standards.
+
+[![Organization](https://img.shields.io/badge/GitHub-devops--infra-181717?style=for-the-badge&logo=github)](https://github.com/devops-infra)
+[![Meta Repo](https://img.shields.io/badge/Meta-.github-blue?style=for-the-badge&logo=githubactions)](https://github.com/devops-infra/.github)
+[![Docker Hub](https://img.shields.io/badge/Docker%20Hub-devopsinfra-2496ED?style=for-the-badge&logo=docker)](https://hub.docker.com/u/devopsinfra)
+[![GHCR](https://img.shields.io/badge/GHCR-devops--infra-2F81F7?style=for-the-badge&logo=github)](https://github.com/orgs/devops-infra/packages)
+
+## What We Build
+
+### CloudOps/DevOps Tooling
+
+- `docker-terragrunt` - multi-arch Terraform/OpenTofu/Terragrunt toolbox docker image
+- `docker-simple-runner` - lightweight CI/CD runner docker image
+- `velez` - Python CLI for cloud orchestration tasks, like IaC/repo/container management/etc.
+
+### GitHub Actions
+
+- `action-commit-push` - commit and push helper
+- `action-container-structure-test` - image validation with Container Structure Test
+- `action-format-hcl` - Terraform/Terragrunt formatting
+- `action-pull-request` - pull request automation
+- `action-terraform-copy-vars` - variable synchronization between environments
+- `action-terraform-validate` - Terraform validation
+- `action-tflint` - TFLint execution
+
+### Templates
+
+- `template-action` - baseline for action repositories
+- `template-repository` - baseline for general repositories
+
+---
+
+Built and maintained by Krzysztof Szyper ([`@ChristophShyper`](https://github.com/ChristophShyper)).