Refactor paperless-ai Helm chart for improved configuration

This update substantially refactors the paperless-ai Helm chart.
Key changes include:

- Complete removal of outdated files: `.helmignore`, `LICENSE`,
  `README.adoc`, and several template files like `configfileConfigmap.yaml`,
  `configmap.yaml`, `dataPvc.yaml`, `envfileSecret.yaml`,
  `openAiApiSecret.yaml`, `paperlessApiSecret.yaml`, and others.

- Introduction of a new Persistent Volume Claim configuration in
  `pvc.yaml` to simplify storage management.

- Significant updates to `Chart.yaml` for better metadata, including
  a new maintainer and project description in German.

- Enhancements to the main deployment template in `deployment.yaml`,
  focusing on clarity and proper utilization of Kubernetes security
  contexts, environment variables, and container properties.

- Updated service definitions in `service.yaml` with better labels
  and service properties.

- Refined the `ingress.yaml` to improve external service access
  management, including annotations for potential customization.

These changes were implemented to modernize the Helm chart based on
the current best practices, improve user experience, and set a
foundation for future enhancements. There are no breaking changes to
the existing user configurations.

charts/paperless-ai/Chart.yaml

@@ -1,26 +1,17 @@
 apiVersion: v2
 name: paperless-ai
-description: A Helm chart for deploying clusterzx/paperless-ai on Kubernetes.
-type: application
-home: https://github.com/ChiliChonka/paperless-ai-helm-chart
+description: Ein Helm Chart für Paperless AI, basierend auf der Docker Compose Konfiguration.
+version: 0.1.0
+appVersion: 3.0.7
 keywords:
-  - paperless-ngx
-  - paperless
   - paperless-ai
-  - Content Management System
-  - Document Management System
-  - Machine Learning
-  - Artificial Intelligence
-  - Ollama
-  - OpenAI API
-  - Automated Document Analyzer
-maintainers:
-  - name: ChiliChonka
-    url: https://github.com/ChiliChonka
+  - document-management
+  - ai
+home: https://git.cooltux.net/marko/HelmChartSammlung/src/branch/main/charts/paperless-ai
 sources:
-  - https://github.com/ChiliChonka/paperless-ai-helm-chart
   - https://github.com/clusterzx/paperless-ai
-  - https://github.com/paperless-ngx/paperless-ngx
-  - https://github.com/ChiliChonka/paperless-ngx-helm-chart
-version: 0.7.0
-appVersion: "3.0.7"
+  - https://git.cooltux.net/marko/HelmChartSammlung/src/branch/main/charts/paperless-ai
+maintainers:
+  - name: Marko Oldenburg
+    email: development@cooltux.net
+    url: https://git.cooltux.net/marko