feat(build): scaffold working admin controllers with model, AdminFS and delete (quick-261028-pq8)

- make:admin-controller edits the singular of its name (--model overrides):
  ModelName, modelClass and the YAML under models/<model>/
- NewRecord returns &models.<Model>{} when the model exists; otherwise the
  nil body stays and the command says to run make:model
- config_list.yaml offers create and delete with showCheckboxes
- registry.gen.go embeds controllers/*/*.yaml and models/*/*.yaml once they
  exist and exposes generatedAdminFS(); scaffolded plugins implement
  pact.AdminAssets through it, and a plugin without AdminFS gets a note
- blog example moves its YAML to models/post; docs and help text follow

cmd/summer/main.go

@@ -270,16 +270,24 @@ func makeAdminControllerCommand() bonfire.Command {
 		Name:        "make:admin-controller",
 		Description: "Generate an admin controller with fields.yaml and columns.yaml",
 		Long: `Writes controllers/<name>.go, its config_form.yaml and config_list.yaml, and
-starter fields.yaml and columns.yaml under models/<name>/, in the plugin with
-this ID or the plugin whose directory you are in. The controller requires the
-permission <plugin>.access_<name>, which you declare in the plugin's
-Permissions(), and its NewRecord returns nil until you return your model, so
-the screens stay closed until you finish it.`,
+starter fields.yaml and columns.yaml under models/<model>/, in the plugin with
+this ID or the plugin whose directory you are in. The model is the singular of
+the name (Posts edits Post) unless --model names it. When models/ already has
+that model, NewRecord returns it; otherwise NewRecord returns nil until you run
+make:model and return it, so the screens stay closed until you finish it. The
+list offers create and delete. The controller requires the permission
+<plugin>.access_<name>, which you declare in the plugin's Permissions(). A
+scaffolded plugin serves the YAML through AdminFS from registry.gen.go.`,
 		Examples: []bonfire.Example{
-			{Command: "make:admin-controller acme.blog Posts", Description: "A Posts controller in acme.blog"},
+			{Command: "make:admin-controller acme.blog Posts", Description: "A Posts controller for the Post model in acme.blog"},
 			{Command: "make:admin-controller Posts", Description: "The same from inside plugins/acme/blog"},
+			{Command: "make:admin-controller acme.blog People --model Person", Description: "A People controller for the Person model"},
 		},
-		Args:        makeArtifactArgs(),
+		Args: makeArtifactArgs(),
+		Flags: []bonfire.Flag{{
+			Name:        "model",
+			Description: "The model the controller edits (default: the singular of the name)",
+		}},
 		Run: func(ctx context.Context, in bonfire.Input, out bonfire.Output) error {
 			dir, err := os.Getwd()
 			if err != nil {
@@ -289,7 +297,8 @@ the screens stay closed until you finish it.`,
 			if err != nil {
 				return err
 			}
-			result, err := build.MakeAdminController(ctx, dir, id, name)
+			model, _ := in.Flag("model")
+			result, err := build.MakeAdminController(ctx, dir, id, name, model)
 			if err != nil {
 				return err
 			}

cmd/summer/main_test.go

@@ -139,6 +139,11 @@ func TestMakeCommandsViaCLI(t *testing.T) {
 		t.Fatalf("make:job output missing reindex.go:\n%s", out)
 	}
 
+	out = runSummer("make:admin-controller", "golem15.demo", "People", "--model", "Person")
+	if !strings.Contains(out, filepath.Join("models", "person", "fields.yaml")) {
+		t.Fatalf("make:admin-controller --model output missing models/person:\n%s", out)
+	}
+
 	t.Chdir(pluginDir)
 	out = runSummer("make:command", "Purge")
 	if !strings.Contains(out, filepath.Join("console", "purge.go")) {