feat(11.1-05): add the walkthrough's admin controller, publish command and published_at migration

- make:admin-controller, make:command and make:migration output, finished:
  the Posts controller serves models.Post behind acme.blog.access_posts,
  WinterCMS-style form and list YAML embedded through pact.AdminAssets,
  blog:publish sets published_at by slug with a bound parameter
- the posts route lists published posts only, newest first
- Docker tests migrate an ICU pl-PL database, roll back published_at, serve
  the route and run blog:publish with a published and an opened database
- the page gains the admin controller, console command and added-column
  sections

docs/examples/blog/registry.gen.go

@@ -3,6 +3,7 @@
 package blog
 
 import (
+	"git.golem15.com/golem15/summercms/docs/examples/blog/controllers"
 	"git.golem15.com/golem15/summercms/docs/examples/blog/models"
 	"git.golem15.com/golem15/summercms/docs/examples/blog/updates"
 	"git.golem15.com/golem15/summercms/modules/bonfire"
@@ -19,6 +20,7 @@ func generatedModels() []any {
 func generatedMigrations() []*gormigrate.Migration {
 	return []*gormigrate.Migration{
 		updates.CreatePosts(),
+		updates.AddPublishedAt(),
 	}
 }
 
@@ -31,5 +33,7 @@ func generatedJobs() []pact.Job {
 }
 
 func generatedAdminControllers() []pact.AdminController {
-	return nil
+	return []pact.AdminController{
+		controllers.PostsController(),
+	}
 }