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/StaticInteractionHandler.test.ts

@@ -0,0 +1,10 @@
+import { StaticInteractionHandler } from '../../../../src/identity/interaction/StaticInteractionHandler';
+
+describe('A FixedInteractionHandler', (): void => {
+  const json = { data: 'data' };
+  const handler = new StaticInteractionHandler(json);
+
+  it('returns the given JSON as response.', async(): Promise<void> => {
+    await expect(handler.handle()).resolves.toEqual({ json });
+  });
+});