feat(fp): WP-14 — Storybook taxonomy reorg + Layers MDX

Retitle all 49 stories into a sidebar that makes the DDD seam visible:
Foundations (curriculum) -> Design System (Atoms/Molecules/Organisms/
Templates/Devtools, everything in shared/ui + shared/layout) -> Domein
(Registratie/Herregistratie/Auth/Brief, everything in a context's ui/).
Pin the order via storySort. Add layers.mdx explaining the split and
linking the enforcing eslint rules; document the story-title convention
in CLAUDE.md. Fix a stale "status banner" reference in atomic-design.mdx
left over from WP-13's upload-status-banner deletion.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/registratie/ui/aanvraag-block/aanvraag-block.stories.ts

@@ -14,7 +14,7 @@ const base = {
 } satisfies Omit<Aanvraag, 'status'>;
 
 const meta: Meta<AanvraagBlockComponent> = {
-  title: 'Organisms/Aanvraag Block',
+  title: 'Domein/Registratie/Aanvraag Block',
   component: AanvraagBlockComponent,
   decorators: [applicationConfig({ providers: [provideRouter([])] })],
   render: (args) => ({

src/app/registratie/ui/address-fields/address-fields.stories.ts

@@ -3,7 +3,7 @@ import { moduleMetadata } from '@storybook/angular';
 import { AddressFieldsComponent } from './address-fields.component';
 
 const meta: Meta<AddressFieldsComponent> = {
-  title: 'Organisms/Address Fields',
+  title: 'Domein/Registratie/Address Fields',
   component: AddressFieldsComponent,
   decorators: [moduleMetadata({ imports: [AddressFieldsComponent] })],
   render: (args) => ({

src/app/registratie/ui/change-request-form/change-request-form.stories.ts

@@ -12,7 +12,7 @@ const validData = {
 };
 
 const meta: Meta<ChangeRequestFormComponent> = {
-  title: 'Organisms/Change Request Form',
+  title: 'Domein/Registratie/Change Request Form',
   component: ChangeRequestFormComponent,
   // The form injects ApiClient (over HttpClient) for the submit command.
   decorators: [applicationConfig({ providers: [provideHttpClient(), provideApiClient()] })],

src/app/registratie/ui/registratie-wizard/registratie-wizard.stories.ts

@@ -46,7 +46,7 @@ const validData: ValidRegistratie = {
 };
 
 const meta: Meta<RegistratieWizardComponent> = {
-  title: 'Registratie/RegistratieWizard',
+  title: 'Domein/Registratie/RegistratieWizard',
   component: RegistratieWizardComponent,
   decorators: [applicationConfig({ providers: [provideHttpClient(), provideApiClient()] })],
 };

src/app/registratie/ui/registration-summary/registration-summary.stories.ts

@@ -11,7 +11,7 @@ const base = {
 } satisfies Omit<Registration, 'status'>;
 
 const meta: Meta<RegistrationSummaryComponent> = {
-  title: 'Organisms/Registration Summary',
+  title: 'Domein/Registratie/Registration Summary',
   component: RegistrationSummaryComponent,
 };
 export default meta;

src/app/registratie/ui/registration-table/registration-table.stories.ts

@@ -2,7 +2,7 @@ import type { Meta, StoryObj } from '@storybook/angular';
 import { RegistrationTableComponent } from './registration-table.component';
 
 const meta: Meta<RegistrationTableComponent> = {
-  title: 'Organisms/Registration Table',
+  title: 'Domein/Registratie/Registration Table',
   component: RegistrationTableComponent,
 };
 export default meta;