feat(task1): restructure directories for turborepo monorepo

- Move backend/ to apps/server/ via git mv
- Move frontend/ to apps/admin/ via git mv
- Create packages/typescript-config/ with base, nestjs, and react-vite presets

apps/server/src/rooms/dto/room.dto.ts

@@ -0,0 +1,53 @@
+import { IsString, IsOptional, IsInt, IsEnum, Min } from 'class-validator';
+
+export class CreateRoomDto {
+  @IsString()
+  roomNumber: string;
+
+  @IsOptional()
+  @IsString()
+  building?: string;
+
+  @IsOptional()
+  @IsInt()
+  floor?: number;
+
+  @IsInt()
+  @Min(1)
+  capacity: number;
+
+  @IsOptional()
+  @IsString()
+  roomType?: string;
+}
+
+export class UpdateRoomDto {
+  @IsOptional()
+  @IsString()
+  roomNumber?: string;
+
+  @IsOptional()
+  @IsString()
+  building?: string;
+
+  @IsOptional()
+  @IsInt()
+  floor?: number;
+
+  @IsOptional()
+  @IsInt()
+  @Min(1)
+  capacity?: number;
+
+  @IsOptional()
+  @IsString()
+  roomType?: string;
+
+  @IsOptional()
+  @IsString()
+  gender?: string;
+
+  @IsOptional()
+  @IsEnum(['available', 'full', 'maintenance'])
+  status?: string;
+}