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/meal-plan/meal-plan.service.d.ts

@@ -12,8 +12,8 @@ export declare class MealPlanService {
             ingredients: {
                 product: {
                     name: string;
-                    canonicalName: string | null;
                     id: number;
+                    canonicalName: string | null;
                 } | null;
                 quantity: import("@prisma/client/runtime/library").Decimal | null;
                 unit: string | null;
@@ -38,8 +38,8 @@ export declare class MealPlanService {
             ingredients: {
                 product: {
                     name: string;
-                    canonicalName: string | null;
                     id: number;
+                    canonicalName: string | null;
                 } | null;
                 quantity: import("@prisma/client/runtime/library").Decimal | null;
                 unit: string | null;