feat: add rematch functionality for recipe ingredients and enhance inventory management

- Added a new API path for rematching recipe ingredients in `api_paths.dart`.
- Implemented a manual product creation dialog in `inventory_screen.dart` to allow users to create new products directly.
- Integrated the rematch functionality in `recipe_repository.dart` to handle rematching of recipe ingredients.
- Updated the recipe detail screen to include a button for triggering the rematch process.
- Introduced a new `RecipeMatchingService` in the backend to handle ingredient matching logic.
- Added database migration to include `aiEngineEnabled` column in the User table.

Co-authored-by: Copilot <copilot@github.com>

backend/dist/receipt-alias/receipt-alias.service.d.ts

@@ -6,8 +6,8 @@ export declare class ReceiptAliasService {
     findAllForUser(userId: number, role: string): import(".prisma/client").Prisma.PrismaPromise<({
         product: {
             name: string;
-            canonicalName: string | null;
             id: number;
+            canonicalName: string | null;
         };
     } & {
         id: number;