Add Helm Support to MCP Server

[bussyjd]

Description: Implement Helm integration in the MCP server using the Helm Go SDK (helm.sh/helm/v3), enabling the following features:

• List Helm releases and their statuses across multiple namespaces.
• Expose an API endpoint (e.g., /helm/releases) to return Helm releases and statuses for specified namespaces.
• Ensure RBAC/service account permissions are sufficient for multi-namespace Helm release access.
• Abstract Helm operations behind an interface for testability and extensibility.

Implementation Plan:

1. Add Helm Go SDK as a dependency in go.mod.
2. Create a new pkg/helm package, implementing a Helm struct/service for listing releases and their statuses, supporting multi-namespace queries.
3. Expose a new API endpoint for Helm releases.
4. Ensure proper RBAC permissions.
5. Abstract Helm operations for future extensibility.

Future Enhancements (not part of initial implementation):

• Helm repo add/remove/update
• Helm install (with dry-run support)
• Helm uninstall
• Helm search hub (chart discovery)

References:

Helm Go SDK: https://pkg.go.dev/helm.sh/helm/v3

[manusa]

Currently working on Helm install tool