Add Twenty app settings custom app (#18273)

## Context
This PR adds the ability to define a front-component as a custom tab for
the application settings, allowing app creators to inject some
logic/rendering the their app settings.


## Example
```typescript
// packages/twenty-apps/my-test-app/src/front-components/settings-custom-tab.tsx
import { defineFrontComponent } from 'twenty-sdk';

export const SETTINGS_CUSTOM_TAB_UNIVERSAL_IDENTIFIER =
  'a42a88a8-21ce-4d22-bc44-d5146da64726';

export const SettingsCustomTab = () => {
  return (
    <div style={{ padding: '20px', fontFamily: 'sans-serif' }}>
      <h2>My Test App Settings</h2>
      <p>This is a custom settings tab provided by My Test App.</p>
      <p>Application creators can customize this component freely.</p>
    </div>
  );
};

export default defineFrontComponent({
  universalIdentifier: SETTINGS_CUSTOM_TAB_UNIVERSAL_IDENTIFIER,
  name: 'settings-custom-tab',
  description: 'Custom settings tab for the application',
  component: SettingsCustomTab,
});
```

```typescript
// packages/twenty-apps/my-test-app/src/application-config.ts
export default defineApplication({
  universalIdentifier: '52870ce6-e584-4bd4-bc1a-6c63c508982e',
  displayName: 'My test app',
  description: '',
  defaultRoleUniversalIdentifier: DEFAULT_ROLE_UNIVERSAL_IDENTIFIER,
  settingsCustomTabFrontComponentUniversalIdentifier:
    SETTINGS_CUSTOM_TAB_UNIVERSAL_IDENTIFIER,
});
```
<img width="786" height="757" alt="Screenshot 2026-02-26 at 14 54 09"
src="https://github.com/user-attachments/assets/fcba70db-35da-48f1-bd65-359e894a691d"
/>

packages/twenty-server/src/database/typeorm/core/migrations/common/1771840510113-add-settings-custom-tab-front-component-id-to-application.ts

@@ -0,0 +1,19 @@
+import { type MigrationInterface, type QueryRunner } from 'typeorm';
+
+export class AddSettingsCustomTabFrontComponentIdToApplication1771840510113
+  implements MigrationInterface
+{
+  name = 'AddSettingsCustomTabFrontComponentIdToApplication1771840510113';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "core"."application" ADD "settingsCustomTabFrontComponentId" uuid`,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "core"."application" DROP COLUMN "settingsCustomTabFrontComponentId"`,
+    );
+  }
+}