chore: migrate backend to monorepo apps and biome

apps/tasks/src/tasks.controller.ts

@@ -0,0 +1,12 @@
+import { Controller, Get } from '@nestjs/common';
+import { TasksService } from './tasks.service';
+
+@Controller()
+export class TasksController {
+  constructor(private readonly tasksService: TasksService) {}
+
+  @Get()
+  getHello(): string {
+    return this.tasksService.getHello();
+  }
+}