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>

applications/plex.yaml

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+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: plex
+  namespace: argocd
+  annotations:
+    # Enable automatic image updates for Plex
+    argocd-image-updater.argoproj.io/image-list: plex=linuxserver/plex
+    # Use newest-build strategy to detect newer versions than 1.41.8
+    argocd-image-updater.argoproj.io/plex.update-strategy: newest-build
+    # Write changes back to Git repository (GitOps workflow)
+    argocd-image-updater.argoproj.io/write-back-method: git
+    # Git configuration for write-back
+    argocd-image-updater.argoproj.io/git-branch: master
+    argocd-image-updater.argoproj.io/git-commit-user: argocd-image-updater
+    argocd-image-updater.argoproj.io/git-commit-email: argocd@turing.lan
+    argocd-image-updater.argoproj.io/git-commit-message: "chore: update Plex image to {{.NewTag}}"
+spec:
+  project: default
+  source:
+    # Use the kube-plex chart repository
+    repoURL: https://github.com/munnerz/kube-plex
+    path: charts/kube-plex
+    targetRevision: HEAD
+    helm:
+      releaseName: plex
+      # Override with values from our Gitea repository
+      parameters:
+        - name: image.repository
+          value: linuxserver/plex
+        - name: image.tag
+          value: "1.41.8"
+        - name: claimToken
+          value: "claim-Ku2YYmJzDB1mpyG6YD7x"
+        - name: timezone
+          value: "Europe/Amsterdam"
+        - name: service.type
+          value: "LoadBalancer"
+        - name: service.port
+          value: "32400"
+        - name: rbac.create
+          value: "true"
+        - name: kubePlex.enabled
+          value: "false"
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: plex
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+    - CreateNamespace=true
+    - ServerSideApply=true

helm-values/plex_values.yml

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+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