feat: backup operation

[debdutdeb]

This pull request introduces significant improvements to local development and testing workflows, particularly around k3d-based Kubernetes environments, and adds new Kubernetes API types for MongoDB backups. The most important changes are the addition of comprehensive k3d Makefile targets and documentation, the introduction of a new MongoDBBackup CRD, and updates to the build and test processes.

Local Development & Testing Enhancements:

• Extensive new Makefile targets for k3d: Adds targets for cluster lifecycle (create, destroy), storage class setup, deploying MongoDB, MinIO, and the Airlock operator, loading images, managing data, and running utility commands like kubectl directly against the cluster. This enables reproducible, scriptable local development and testing environments.
• New section in README.md: Documents all Makefile targets for k3d cluster management, deployment, image handling, and common workflows, making it much easier for developers to set up, test, and debug locally.

Kubernetes API Additions:

• Adds MongoDBBackup Custom Resource Definition: Introduces MongoDBBackup and related types, including phases, conditions, and status structures. Also defines rules for phase transitions using conditions, supporting robust backup state management in the operator.
• Adds Object2 interface: Defines a new interface in the API for objects that track phase and observed generation, enabling generic controller logic.

Build & Test Process Improvements:

• Updates to Makefile test/build targets: Separates unit and integration tests, ensures manifests are generated during builds, and improves Docker build targets to better support local workflows. [1] [2]
• Bumps CONTROLLER_TOOLS_VERSION: Updates to a newer version for controller tools, likely for compatibility and bug fixes.

CI/CD Workflow:

• Switches k3d setup in GitHub Actions: Replaces nolar/setup-k3d-k3s with RocketChat/k3d-with-registry@main for improved or customized k3d cluster setup in CI.

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Local development & testing:

• Adds comprehensive Makefile targets for k3d cluster management, deployment, image loading, and data operations, enabling easy local testing and debugging of the operator and dependencies.
• Documents all new Makefile targets and workflows in README.md, providing step-by-step instructions for local development and testing.

Kubernetes API/CRD:

• Introduces MongoDBBackup CRD and supporting types, including phase/condition management and status fields, to support backup orchestration in the operator.
• Adds a generic Object2 interface for phase and observed generation tracking in API objects.

Build & CI improvements:

• Refines Makefile build and test targets for better separation of unit/integration tests, manifest generation, and Docker image workflows. [1] [2]
• Updates controller tools version and switches k3d setup action in GitHub workflows for improved compatibility and reliability. [1] [2]

[geekgonecrazy]

typo :)