feat(clientcache): add sort parameters to SearchParams

internal/clientcache/internal/cache/search.go

@@ -25,6 +25,15 @@ const (
 	SortByCreatedAt SortBy = "created_at"
 )
 
+// Valid returns true if the SortBy value is a known good value
+func (s SortBy) Valid() bool {
+	switch s {
+	case SortByDefault, SortByName, SortByCreatedAt:
+		return true
+	}
+	return false
+}
+
 type SortDirection string
 
 const (
@@ -33,6 +42,15 @@ const (
 	Descending           SortDirection = "desc"
 )
 
+// Valid returns true if the SortDirection value is a known good value
+func (d SortDirection) Valid() bool {
+	switch d {
+	case SortDirectionDefault, Ascending, Descending:
+		return true
+	}
+	return false
+}
+
 type SearchableResource string
 
 const (