[ci skip] Move Terraform modules into stack directories

Move all 88 service modules (66 individual + 22 platform) from
modules/kubernetes/<service>/ into their corresponding stack directories:

- Service stacks: stacks/<service>/module/
- Platform stack: stacks/platform/modules/<service>/

This collocates module source code with its Terragrunt definition.
Only shared utility modules remain in modules/kubernetes/:
ingress_factory, setup_tls_secret, dockerhub_secret, oauth-proxy.

All cross-references to shared modules updated to use correct
relative paths. Verified with terragrunt run --all -- plan:
0 adds, 0 destroys across all 68 stacks.

stacks/homepage/module/main.tf

@@ -0,0 +1,30 @@
+variable "tls_secret_name" {}
+variable "tier" { type = string }
+
+module "tls_secret" {
+  source          = "../../../modules/kubernetes/setup_tls_secret"
+  namespace       = kubernetes_namespace.homepage.metadata[0].name
+  tls_secret_name = var.tls_secret_name
+}
+
+resource "kubernetes_namespace" "homepage" {
+  metadata {
+    name = "homepage"
+    labels = {
+      "istio-injection" : "disabled"
+      tier = var.tier
+    }
+  }
+}
+
+resource "helm_release" "homepage" {
+  namespace        = kubernetes_namespace.homepage.metadata[0].name
+  create_namespace = false
+  name             = "homepage"
+  atomic           = true
+
+  repository = "http://jameswynn.github.io/helm-charts"
+  chart      = "homepage"
+
+  values = [templatefile("${path.module}/values.yaml", { tls_secret_name = var.tls_secret_name })]
+}

stacks/homepage/module/values.yaml

@@ -0,0 +1,155 @@
+image:
+  repository: ghcr.io/gethomepage/homepage
+  tag: v1.8.0
+
+# Enable RBAC. RBAC is necessary to use Kubernetes integration
+enableRbac: true
+
+extraClusterRoles:
+  # - apiGroups:
+  #   - some-group
+  #   resources:
+  #   - some-resource
+  #   verbs:
+  #   - get
+
+serviceAccount:
+  # Specify a different service account name. When blank it will default to the release
+  # name if *create* is enabled, otherwise it will refer to the default service account.
+  name: ""
+  # Create service account. Needed when RBAC is enabled.
+  create: false
+
+service:
+  main:
+    ports:
+      http:
+        port: 3000
+
+controller:
+  strategy: RollingUpdate
+  rollingUpdate:
+    maxSurge: 25%
+    maxUnavailable: 25%
+
+# Enable the ingress to expose Homepage to the network.
+ingress:
+  main:
+    enabled: true
+    labels:
+      # This label will enable discover of this deployment in Homepage
+      gethomepage.dev/enabled: "true"
+    annotations:
+      # These annotations will configure how this deployment is shown in Homepage
+      gethomepage.dev/name: "Homepage"
+      gethomepage.dev/description: "A modern, secure, highly customizable application dashboard."
+      gethomepage.dev/group: "A New Group"
+      gethomepage.dev/icon: "homepage.png"
+    ingressClassName: "traefik"
+    hosts:
+      - host: &host "home.viktorbarzin.me"
+        paths:
+          - path: /
+            pathType: Prefix
+    tls:
+      - hosts:
+          - *host
+        secretName: ${tls_secret_name}
+
+# All the config files for Homepage can be specified under their relevant config block.
+config:
+  # To use an existing ConfigMap uncomment this line and specify the name
+  # useExistingConfigMap: existing-homepage-configmap
+  bookmarks:
+    - Developer:
+        - Github:
+            - abbr: Viktor Barzin
+              href: https://github.com/viktorbarzin
+  services:
+    # - My First Group:
+    #     - My First Service:
+    #         href: http://localhost/
+    #         description: Homepage is awesome
+
+    # - My Second Group:
+    #     - My Second Service:
+    #         href: http://localhost/
+    #         description: Homepage is the best
+
+    # - My Third Group:
+    #     - My Third Service:
+    #         href: http://localhost/
+    #         description: Homepage is 😎
+  widgets:
+    - resources:
+        # change backend to 'kubernetes' to use Kubernetes integration. Requires RBAC.
+        # backend: resources
+        backend: kubernetes
+        expanded: true
+        cpu: true
+        memory: true
+    - search:
+        provider: duckduckgo
+        target: _blank
+    ## Uncomment to enable Kubernetes integration
+    - kubernetes:
+        cluster:
+          show: true
+          cpu: true
+          memory: true
+          showLabel: true
+          label: "cluster"
+        nodes:
+          show: true
+          cpu: true
+          memory: true
+          showLabel: true
+  kubernetes:
+    # change mode to 'cluster' to use RBAC service account
+    # mode: disable
+    mode: cluster
+  docker:
+  settings:
+
+# -- Main environment variables. Template enabled.
+# Syntax options:
+# A) TZ: UTC
+# B) PASSWD: '{{ .Release.Name }}'
+# C) PASSWD:
+#      configMapKeyRef:
+#        name: config-map-name
+#        key: key-name
+# D) PASSWD:
+#      valueFrom:
+#        secretKeyRef:
+#          name: secret-name
+#          key: key-name
+#      ...
+# E) - name: TZ
+#      value: UTC
+# F) - name: TZ
+#      value: '{{ .Release.Name }}'
+env:
+  HOMEPAGE_ALLOWED_HOSTS: home.viktorbarzin.me
+
+
+# To include environment variables from other configs or other secrets for use in
+# Homepage's variable substitutions. Refer to them here.
+# envFrom:
+#   - secretRef:
+#       name: my-secret
+#   - configMapRef:
+#       name: my-configmap
+
+persistence:
+  logs:
+    enabled: true
+    type: emptyDir
+    mountPath: /app/config/logs
+# resources:
+#   requests:
+#     memory: 10Mi
+#     cpu: 10m
+#   limits:
+#     memory: 200Mi
+#     cpu: 500m