refactor: move Helm chart to standard directory structure

This commit restructures the paperless-ai Helm chart by moving all files
 from the nested directory (charts/paperless-ai/paperless-ai/) to the
 standard Helm chart directory structure (charts/paperless-ai/). The change
 eliminates the redundant directory nesting that was causing issues with
 Helm chart packaging and installation. No functional changes were made to
 any files - this is purely a directory structure reorganization to follow
 Helm best practices and improve chart maintainability.

charts/paperless-ai/Chart.yaml

@@ -0,0 +1,26 @@
+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
+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
+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: 0.1.0
+appVersion: "2.1.3"