feat: Initialize Helm charts repository with .gitignore, README, and Jellyfin chart documentation.

docs/jellyfin.md

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+# Jellyfin Helm Chart
+
+A modern, parameterized Helm chart for Jellyfin media server with PostgreSQL support and integrated backup capabilities.
+
+## Features
+- **PostgreSQL Support**: Uses the Jellyfin PostgreSQL adapter for robust database storage.
+- **Database Initialization**: Automated schema and database creation via `db-init` job.
+- **Backups**: Integrated CronJob for automated database backups with configurable retention.
+- **Ingress**: Dual-ingress pattern support (Internal HTTP and External HTTPS via Traefik).
+- **Security**: Designed for use with `existingSecret` for credentials management.
+
+## Installation
+
+### 1. Create a Secret
+Create a secret named `jellyfin-secret` containing:
+- `JELLYFIN_POSTGRESQL_PASSWORD`: The password for the jellyfin user.
+- `POSTGRES_ADMIN_PASSWORD`: The superuser password for database initialization.
+
+### 2. Configure Values
+Review the [values.yaml](https://github.com/shadoll/helm-charts/blob/main/jellyfin/values.yaml) and create your override file.
+
+### 3. Install
+```bash
+helm install my-jellyfin ./jellyfin -f my-values.yaml
+```
+
+## Configuration Reference
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `image.repository` | Jellyfin image repository | `ghcr.io/rogly-net/jellyfin-postgresql` |
+| `image.tag` | Jellyfin image tag | (Chart appVersion) |
+| `postgres.host` | PostgreSQL host address | `postgres-tcp.postgres.svc.cluster.local` |
+| `persistence.config.enabled` | Enable config persistence | `true` |
+| `backup.enabled` | Enable automated backups | `true` |
+
+For detailed configuration, see the [values.yaml](https://github.com/shadoll/helm-charts/blob/main/jellyfin/values.yaml).