chore: add flyer import module and configuration

- Added FlyerImportModule to AppModule imports
- Created new flyer-import module directory
- Added .kilo/ configuration directory

backend/src/flyer-import/dto/flyer-import.response.ts

@@ -0,0 +1,26 @@
+export type FlyerImportMatchVia = 'alias' | 'exact' | 'token' | 'none';
+
+export type FlyerImportItem = {
+  rawName: string;
+  normalizedName: string;
+  category: string | null;
+  price: number | null;
+  priceUnit: string | null;
+  comparisonPrice: number | null;
+  comparisonUnit: string | null;
+  offerText: string | null;
+  parseConfidence: number;
+  parseReasons: string[];
+  matchedProductId: number | null;
+  matchedProductName: string | null;
+  matchedVia: FlyerImportMatchVia;
+  matchConfidence: number;
+  matchReasons: string[];
+};
+
+export type FlyerImportResponse = {
+  retailer: 'willys';
+  parserVersion: 'v1';
+  items: FlyerImportItem[];
+  warnings: string[];
+};