feat: Full rework of account management

Complete rewrite of the account management and related systems.
Makes the architecture more modular,
allowing for easier extensions and configurations.

test/unit/identity/interaction/oidc/ForgetWebIdHandler.test.ts

@@ -0,0 +1,43 @@
+import type { ProviderFactory } from '../../../../../src/identity/configuration/ProviderFactory';
+import type { Interaction } from '../../../../../src/identity/interaction/InteractionHandler';
+import { ForgetWebIdHandler } from '../../../../../src/identity/interaction/oidc/ForgetWebIdHandler';
+import type Provider from '../../../../../templates/types/oidc-provider';
+
+describe('A ForgetWebIdHandler', (): void => {
+  let oidcInteraction: Interaction;
+  let provider: jest.Mocked<Provider>;
+  let providerFactory: jest.Mocked<ProviderFactory>;
+  let handler: ForgetWebIdHandler;
+
+  beforeEach(async(): Promise<void> => {
+    oidcInteraction = {
+      lastSubmission: { login: { accountId: 'id' }},
+      persist: jest.fn(),
+      session: {
+        cookie: 'cookie',
+      },
+      returnTo: 'returnTo',
+    } as any;
+
+    provider = {
+      /* eslint-disable @typescript-eslint/naming-convention */
+      Session: {
+        find: jest.fn().mockResolvedValue({ persist: jest.fn() }),
+      },
+      /* eslint-enable @typescript-eslint/naming-convention */
+    } as any;
+
+    providerFactory = {
+      getProvider: jest.fn().mockResolvedValue(provider),
+    };
+
+    handler = new ForgetWebIdHandler(providerFactory);
+  });
+
+  it('forgets the WebID and updates the interaction.', async(): Promise<void> => {
+    await expect(handler.handle({ oidcInteraction } as any)).rejects.toThrow(expect.objectContaining({
+      statusCode: 302,
+      location: 'returnTo',
+    }));
+  });
+});