feat: 新增食物库模块，含模型、服务、API及初始化数据

src/app.module.ts

@@ -16,6 +16,7 @@ import { WorkoutsModule } from './workouts/workouts.module';
 import { MoodCheckinsModule } from './mood-checkins/mood-checkins.module';
 import { GoalsModule } from './goals/goals.module';
 import { DietRecordsModule } from './diet-records/diet-records.module';
+import { FoodLibraryModule } from './food-library/food-library.module';
 
 @Module({
   imports: [
@@ -37,6 +38,7 @@ import { DietRecordsModule } from './diet-records/diet-records.module';
     MoodCheckinsModule,
     GoalsModule,
     DietRecordsModule,
+    FoodLibraryModule,
   ],
   controllers: [AppController],
   providers: [AppService],