feat(flux): add FluxCD GitOps configuration

Add Flux GitRepository and Kustomization resources to enable
automated cluster synchronization from Gitea repository.

- GitRepository: monitors ssh://git@10.0.1.10/0xWheatyz/Talos
- Kustomization: syncs testing1/first-cluster/ to cluster
- Interval: 1m for git polling, 5m for reconciliation
- Prune enabled for automatic cleanup

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

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

testing1/first-cluster/cluster/flux/gitrepository.yaml

@@ -0,0 +1,13 @@
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: GitRepository
+metadata:
+  name: talos-gitops
+  namespace: flux-system
+spec:
+  interval: 1m
+  url: ssh://git@10.0.1.10/0xWheatyz/Talos
+  ref:
+    branch: main
+  secretRef:
+    name: gitea-ssh

testing1/first-cluster/cluster/flux/kustomization-sync.yaml

@@ -0,0 +1,30 @@
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: cluster-sync
+  namespace: flux-system
+spec:
+  interval: 5m
+  path: ./testing1/first-cluster
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: talos-gitops
+  healthChecks:
+    - apiVersion: apps/v1
+      kind: Deployment
+      namespace: flux-system
+      name: helm-controller
+    - apiVersion: apps/v1
+      kind: Deployment
+      namespace: flux-system
+      name: kustomize-controller
+    - apiVersion: apps/v1
+      kind: Deployment
+      namespace: flux-system
+      name: notification-controller
+    - apiVersion: apps/v1
+      kind: Deployment
+      namespace: flux-system
+      name: source-controller

testing1/first-cluster/cluster/flux/kustomization.yaml

@@ -0,0 +1,5 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - gitrepository.yaml
+  - kustomization-sync.yaml