Refactor backend folder structure (#4505)

* Refactor backend folder structure

Co-authored-by: Charles Bochet <charles@twenty.com>

* fix tests

* fix

* move yoga hooks

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/engine/integrations/email/email.module.ts

@@ -0,0 +1,30 @@
+import { DynamicModule, Global } from '@nestjs/common';
+
+import { EmailModuleAsyncOptions } from 'src/engine/integrations/email/interfaces/email.interface';
+
+import { EMAIL_DRIVER } from 'src/engine/integrations/email/email.constants';
+import { LoggerDriver } from 'src/engine/integrations/email/drivers/logger.driver';
+import { SmtpDriver } from 'src/engine/integrations/email/drivers/smtp.driver';
+import { EmailService } from 'src/engine/integrations/email/email.service';
+import { EmailSenderService } from 'src/engine/integrations/email/email-sender.service';
+
+@Global()
+export class EmailModule {
+  static forRoot(options: EmailModuleAsyncOptions): DynamicModule {
+    const provider = {
+      provide: EMAIL_DRIVER,
+      useFactory: (...args: any[]) => {
+        const config = options.useFactory(...args);
+
+        return config ? new SmtpDriver(config) : new LoggerDriver();
+      },
+      inject: options.inject || [],
+    };
+
+    return {
+      module: EmailModule,
+      providers: [EmailSenderService, EmailService, provider],
+      exports: [EmailSenderService, EmailService],
+    };
+  }
+}