Community Helm chart available for AdGuard Home on Kubernetes

### Prerequisites

- [x] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions) and found no answer
- [x] I have searched other issues and found no duplicates
- [x] I want to request a feature or enhancement and not ask a question

### The problem

Deploying AdGuard Home on Kubernetes requires manual manifest creation. There is no official Helm chart, and community options are scattered and inconsistent.

### Proposed solution

A community Helm chart for AdGuard Home is available as part of [HelmForge](https://github.com/helmforgedev/charts), an MIT-licensed Helm chart repository.

The chart supports:

- **Network-wide DNS ad/tracker blocking** with persistent configuration
- **Multi-instance sync** support for high-availability setups
- **S3-compatible backup** — CronJob that archives AdGuard Home config and uploads to any S3 endpoint
- **DNS service** via LoadBalancer with configurable external IP (UDP/TCP port 53)
- **Ingress support** with TLS for the web admin UI
- CI validated with lint, template, helm-unittest, and kubeconform

This is a community chart, not affiliated with the AdGuard project.

**Install:**

```bash
helm repo add helmforge https://repo.helmforge.dev
helm install adguard-home helmforge/adguard-home

# Or via OCI
helm install adguard-home oci://ghcr.io/helmforgedev/helm/adguard-home
```

- Chart source: https://github.com/helmforgedev/charts/tree/main/charts/adguard-home
- ArtifactHub: https://artifacthub.io/packages/helm/helmforge/adguard-home
- Documentation: https://helmforge.dev/docs/charts/adguard-home

### Alternatives considered and additional information

Would you be open to listing this chart in the AdGuard Home Wiki as a community deployment option for Kubernetes?