refactor(cluster)!: Update flux installation and upgrade method

Other changes include:
- Rename cluster/base to cluster/flux
- Add config and charts fluxtomizations
- Update scripts and taskfiles to reflect changes

cluster/flux/apps.yaml

@@ -0,0 +1,25 @@
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
+kind: Kustomization
+metadata:
+  name: apps
+  namespace: flux-system
+spec:
+  interval: 10m
+  path: ./cluster/apps
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: flux-cluster
+  dependsOn:
+    - name: core
+  decryption:
+    provider: sops
+    secretRef:
+      name: sops-age
+  postBuild:
+    substituteFrom:
+      - kind: ConfigMap
+        name: cluster-settings
+      - kind: Secret
+        name: cluster-secrets

cluster/flux/charts.yaml

@@ -0,0 +1,13 @@
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
+kind: Kustomization
+metadata:
+  name: charts
+  namespace: flux-system
+spec:
+  interval: 10m
+  path: ./cluster/charts
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: flux-cluster

cluster/flux/config.yaml

@@ -0,0 +1,17 @@
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
+kind: Kustomization
+metadata:
+  name: config
+  namespace: flux-system
+spec:
+  interval: 10m
+  path: ./cluster/config
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: flux-cluster
+  decryption:
+    provider: sops
+    secretRef:
+      name: sops-age

cluster/flux/core.yaml

@@ -0,0 +1,27 @@
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
+kind: Kustomization
+metadata:
+  name: core
+  namespace: flux-system
+spec:
+  interval: 10m
+  path: ./cluster/core
+  prune: false
+  sourceRef:
+    kind: GitRepository
+    name: flux-cluster
+  dependsOn:
+    - name: charts
+    - name: config
+    - name: crds
+  decryption:
+    provider: sops
+    secretRef:
+      name: sops-age
+  postBuild:
+    substituteFrom:
+      - kind: ConfigMap
+        name: cluster-settings
+      - kind: Secret
+        name: cluster-secrets

cluster/flux/crds.yaml

@@ -0,0 +1,13 @@
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
+kind: Kustomization
+metadata:
+  name: flux-crds
+  namespace: flux-system
+spec:
+  interval: 10m
+  path: ./cluster/crds
+  prune: false
+  sourceRef:
+    kind: GitRepository
+    name: flux-cluster

cluster/flux/flux-system/flux-installation.yaml

@@ -0,0 +1,31 @@
+---
+apiVersion: source.toolkit.fluxcd.io/v1beta2
+kind: GitRepository
+metadata:
+  name: flux-installation
+  namespace: flux-system
+spec:
+  interval: 10m
+  ref:
+    # renovate: datasource=github-releases depName=fluxcd/flux2
+    tag: v0.30.2
+  url: https://github.com/fluxcd/flux2
+  ignore: |
+    # exclude all
+    /*
+    # path to manifests
+    !/manifests
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
+kind: Kustomization
+metadata:
+  name: flux-installation
+  namespace: flux-system
+spec:
+  interval: 10m
+  path: ./manifests/install
+  prune: true
+  wait: true
+  sourceRef:
+    kind: GitRepository
+    name: flux-installation

cluster/flux/flux-system/kustomization.yaml

@@ -0,0 +1,6 @@
+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - flux-installation.yaml
+  - flux-cluster.yaml