feat(11.1-04): add the Backend section, the remaining Services pages and the concept map links

- docs/backend: admin controllers, forms, lists and filters, relation
  manager, users and permissions, settings, partials and widgets, admin SPA
- docs/services: storage, outbound HTTP, realtime, Web Push, search, parity
  testing and the Frontend and AJAX (not provided) page
- Examples for cabana (with testdata/docs YAML), fetchguard, lighthouse and
  its centrifugo driver, flare, beachcomber and typesense, tide; lighthouse
  and beachcomber TestDocs* regions run on their Postgres harnesses
- concept map rows link their guide pages and the not-provided rows the
  Frontend and AJAX page; index lists Backend, Database and Services
- TestDocsRequiredPages asserts the D-08 section order

modules/cabana/testdata/docs/controllers/posts/config_filter.yaml

@@ -0,0 +1,9 @@
+scopes:
+    published:
+        label: acme.blog::lang.posts.published
+        type: switch
+        column: published
+    published_at:
+        label: acme.blog::lang.posts.published_at
+        type: daterange
+        column: published_at

modules/cabana/testdata/docs/controllers/posts/config_form.yaml

@@ -0,0 +1,10 @@
+name: acme.blog::lang.posts.form
+form: ~/plugins/acme/blog/models/post/fields.yaml
+modelClass: Post
+defaultRedirect: acme/blog/posts
+create:
+    redirect: acme/blog/posts/update/:id
+    redirectClose: acme/blog/posts
+update:
+    redirect: acme/blog/posts
+    redirectClose: acme/blog/posts

modules/cabana/testdata/docs/controllers/posts/config_list.yaml

@@ -0,0 +1,15 @@
+list: ~/plugins/acme/blog/models/post/columns.yaml
+modelClass: Post
+title: acme.blog::lang.posts.title
+recordUrl: acme/blog/posts/update/:id
+recordsPerPage: 20
+perPageOptions: [20, 50, 100]
+showCheckboxes: true
+defaultSort:
+    column: published_at
+    direction: desc
+filter: config_filter.yaml
+toolbar:
+    buttons: [create, delete]
+    search:
+        prompt: backend::lang.list.search_prompt

modules/cabana/testdata/docs/models/post/columns.yaml

@@ -0,0 +1,10 @@
+columns:
+    title:
+        label: acme.blog::lang.posts.title_column
+        searchable: true
+    published:
+        label: acme.blog::lang.posts.published
+        type: switch
+    published_at:
+        label: acme.blog::lang.posts.published_at
+        type: datetime

modules/cabana/testdata/docs/models/post/fields.yaml

@@ -0,0 +1,28 @@
+fields:
+    title:
+        label: acme.blog::lang.posts.title_column
+        type: text
+        span: left
+        required: true
+    slug:
+        label: acme.blog::lang.posts.slug
+        type: text
+        span: right
+        context: update
+        comment: acme.blog::lang.posts.slug_comment
+    status:
+        label: acme.blog::lang.posts.status
+        type: dropdown
+        span: left
+        options:
+            draft: acme.blog::lang.posts.draft
+            published: acme.blog::lang.posts.published
+    published:
+        label: acme.blog::lang.posts.published
+        type: switch
+        span: right
+    content:
+        label: acme.blog::lang.posts.content
+        type: textarea
+        size: large
+        tab: acme.blog::lang.posts.tab_content

modules/cabana/testdata/docs/models/settings/fields.yaml

@@ -0,0 +1,10 @@
+fields:
+    posts_per_page:
+        label: acme.blog::lang.settings.posts_per_page
+        type: number
+        span: left
+        default: 10
+    comments_enabled:
+        label: acme.blog::lang.settings.comments_enabled
+        type: switch
+        span: right