feat: implement rollback command for deployments

- Added a new `rollback` command to roll back deployments to their previous release.
- Introduced `findRollbackCandidates` and `rollbackDeployment` functions to handle rollback logic.
- Updated CLI command definitions to include the new `rollback` command with an alias.
- Enhanced deployment conversion to use resolved images for buildable services.
- Introduced a new `graph` module to visualize Kubernetes resources and their relationships.
- Added tests for the new rollback functionality and graph rendering.
- Updated package version to 1.3.0.

tests/lib/config.test.ts

@@ -102,13 +102,13 @@ describe("kuber config", () => {
       { services: { app: { build: "." } } },
       process.cwd(),
       {},
-      "registry.example.com/team",
+      { app: `registry.example.com/team/kuber/project-app:latest@sha256:${"a".repeat(64)}` },
     );
     const deployment = resources.find(
       (resource) => resource.kind === "Deployment",
     ) as V1Deployment | undefined;
     expect(deployment?.spec?.template.spec?.containers[0]?.image).toBe(
-      "registry.example.com/team/kuber/project-app:latest",
+      `registry.example.com/team/kuber/project-app:latest@sha256:${"a".repeat(64)}`,
     );
   });
 });