feat: add product domain and machine integration

- extend Prisma schema with products, product constructs and link tables\n- introduce product service, DTOs and includes with constructeur support\n- integrate product selections across model type skeletons, composants, pièces and machines\n- validate product requirements when building machine skeletons and payloads

src/products/products.controller.ts

@@ -0,0 +1,43 @@
+import {
+  Body,
+  Controller,
+  Delete,
+  Get,
+  Param,
+  Patch,
+  Post,
+  Query,
+} from '@nestjs/common';
+import { ProductsService } from './products.service';
+import { CreateProductDto, UpdateProductDto } from '../shared/dto/product.dto';
+import { ListProductsQueryDto } from './dto/list-products.dto';
+
+@Controller('products')
+export class ProductsController {
+  constructor(private readonly productsService: ProductsService) {}
+
+  @Get()
+  list(@Query() query: ListProductsQueryDto) {
+    return this.productsService.list(query);
+  }
+
+  @Get(':id')
+  findOne(@Param('id') id: string) {
+    return this.productsService.findOne(id);
+  }
+
+  @Post()
+  create(@Body() createProductDto: CreateProductDto) {
+    return this.productsService.create(createProductDto);
+  }
+
+  @Patch(':id')
+  update(@Param('id') id: string, @Body() updateProductDto: UpdateProductDto) {
+    return this.productsService.update(id, updateProductDto);
+  }
+
+  @Delete(':id')
+  remove(@Param('id') id: string) {
+    return this.productsService.remove(id);
+  }
+}