added new file

src/app/utils/propertyFilters.ts

@@ -0,0 +1,19 @@
+export type FilterField =
+  | "address"
+  | "postcode"
+  | "status"
+  | "currentEpcRating"
+  | "currentSapPoints";
+
+export type FilterOperator =
+  | "contains"
+  | "starts_with"
+  | "equals"
+  | "gte"
+  | "lte";
+
+export interface PropertyFilter {
+  field: FilterField;
+  operator: FilterOperator;
+  value: string;
+}