Move session entity to sessions folder

Signed-off-by: Yannick Bungers <git@innay.de>

backend/src/sessions/session.module.ts

@@ -0,0 +1,17 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+
+import { Session } from './session.entity';
+import { SessionService } from './session.service';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([Session])],
+  exports: [SessionService],
+  providers: [SessionService],
+})
+export class SessionModule {}