Add Plex GitOps application for automatic image updates

- Create organized directory structure (applications/, helm-values/)
- Add ArgoCD Application manifest for Plex with image auto-updater
- Configure automatic upgrade detection from current 1.41.8 to latest
- Enable Git write-back for GitOps workflow
- Use existing kube-plex chart with LinuxServer Plex image

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

helm-values/plex_values.yml

@@ -0,0 +1,49 @@
+claimToken: "claim-Ku2YYmJzDB1mpyG6YD7x"
+
+image:
+  repository: linuxserver/plex
+  tag: 1.41.8
+  pullPolicy: Always
+
+
+kubePlex:
+  enabled: false # kubePlex (transcoder job) is disabled because not available on ARM. The transcoding will be performed by the main Plex instance instead of a separate Job.
+
+timezone: Europe/Amsterdam
+
+service:
+  type: LoadBalancer # We will use a LoadBalancer to obtain a virtual IP that can be exposed to Plex Media via our router
+  port: 32400 # Port to expose Plex
+
+rbac:
+  create: true
+
+nodeSelector:
+  kubernetes.io/arch: amd64
+
+persistence:
+  transcode:
+    claimName: "plex-transcode"
+  data:
+    claimName: "plex-data"
+  config:
+    claimName: "plex-config"
+
+# GPU support for hardware-accelerated transcoding
+gpu:
+  enabled: true
+  hostPath: "/dev/dri"
+  mountPath: "/dev/dri"
+
+resources:
+  requests:
+    memory: "2Gi"
+    cpu: "1"
+    ephemeral-storage: "50Mi"
+  limits:
+    memory: "10Gi"
+    cpu: "3"
+    ephemeral-storage: "1Gi"
+podAnnotations: {}
+proxy:
+  enable: false