Add configurable GPU support for hardware transcoding

- Add gpu configuration section to values.yaml with enable/disable toggle
- Make hostPath and mountPath configurable with sensible defaults (/dev/dri)
- Update deployment template with conditional GPU volume mounting
- GPU support is disabled by default for backward compatibility
- When enabled, mounts host GPU devices for hardware-accelerated transcoding

Usage:
  gpu:
    enabled: true
    hostPath: "/dev/dri"      # Host GPU device path
    mountPath: "/dev/dri"     # Container mount path

This allows users to easily enable GPU acceleration while maintaining
flexibility for different GPU setups and container paths.

charts/kube-plex/templates/deployment.yaml

@@ -135,6 +135,11 @@ spec:
   {{- end }}
 {{- end }}
         volumeMounts:
+        {{- if .Values.gpu.enabled }}
+        - name: dev-dri
+          mountPath: {{ .Values.gpu.mountPath }}
+          readOnly: true
+        {{- end }}
         - name: data
           mountPath: /data
         {{- if .Values.persistence.data.subPath }}
@@ -163,6 +168,11 @@ spec:
 {{ toYaml .Values.nodeSelector | indent 8 }}
     {{- end }}
       volumes:
+      {{- if .Values.gpu.enabled }}
+      - name: dev-dri
+        hostPath:
+          path: {{ .Values.gpu.hostPath }}
+      {{- end }}
       - name: data
         persistentVolumeClaim:
 {{- if .Values.persistence.data.claimName }}

charts/kube-plex/values.yaml

@@ -146,3 +146,12 @@ tolerations: []
 
 # allows specifying node affinity
 affinity: {}
+
+# GPU support for hardware-accelerated transcoding
+gpu:
+  # Enable GPU support (mount /dev/dri from host)
+  enabled: false
+  # Host path to GPU device directory
+  hostPath: "/dev/dri"
+  # Container mount path for GPU devices
+  mountPath: "/dev/dri"