Use official helm library

[Jancis]

Replaces https://pkg.go.dev/github.com/mittwald/go-helm-client library with official helm library

[Copilot]

Pull Request Overview

This PR replaces the third-party github.com/mittwald/go-helm-client library with the official Helm v3 library (helm.sh/helm/v3). The refactor consolidates Kubernetes client initialization into a common utility function and updates all Helm operations to use the official APIs.

• Migrates from unofficial go-helm-client to official helm.sh/helm/v3 library
• Consolidates Kubernetes client initialization into a reusable GetKubeClient() function
• Updates all Helm operations (list, get, uninstall) to use official Helm action API

Reviewed Changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
internal/common/kube.go	New file containing centralized Kubernetes client initialization
internal/common/ciReleaseFunctions.go	Updates Helm uninstall operations and adds failed release cleanup using official APIs
go.mod	Removes dependency on github.com/mittwald/go-helm-client
cmd/ciScriptsEsInitRemove.go	Replaces inline K8s client setup with common utility function
cmd/ciReleaseWakeup.go	Migrates Helm client initialization to official library
cmd/ciReleaseList.go	Updates release listing to use official Helm action API
cmd/ciReleaseDiff.go	Replaces inline K8s client setup with common utility function
cmd/ciReleaseDeploy.go	Updates K8s client initialization and replaces shell script with Go function
cmd/ciReleaseDelete.go	Migrates Helm client initialization and uninstall operations to official APIs
cmd/ciReleaseCleanfailed.go	Simplifies implementation by using new common cleanup function

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