77 more search options (#78)

* added search for copyright

* added search by reference

src/datasources/sql/products-sql.ts

@@ -161,6 +161,14 @@ export function designerProducts() {
   );
 }
 
+export function referenceProducts() {
+  return (
+    baseQuery +
+    /* sql */ `
+    WHERE LOWER(products.ref1) LIKE ? OR LOWER(products.ref2) LIKE ? OR LOWER(products.ref3) LIKE ? ORDER BY products.inserted DESC`
+  );
+}
+
 export function keywordProducts(keywordId: number) {
   return (
     baseQuery +