feat: add basic readwise example

pkg/platform.go

@@ -13,6 +13,16 @@ type Platform struct {
 	Collections []*Collection // Child nodes
 }
 
+func (platform *Platform) GetDefaultCollection() (*Collection, error) {
+	for _, collection := range platform.Collections {
+		if collection.IsDefault() {
+			return collection, nil
+		}
+	}
+
+	return nil, fmt.Errorf("Default collection not found")
+}
+
 // Is a type alias for FetchResponse containing a slice of Collection pointers.
 type FetchCollectionResponse = FetchResponse[[]*Collection]