feat: get handlers return object slices

core/interfaces/handler.go

@@ -19,7 +19,7 @@ type ResourceHandler interface {
 }
 
 type GetHandler interface {
-	Get(ctx context.Context, params params.Container) (any, error)
+	Get(ctx context.Context, params params.Container) ([]any, error)
 }
 
 type Verb string

core/interfaces/output.go

@@ -3,5 +3,5 @@ package interfaces
 import "io"
 
 type Formatter interface {
-	Format(object any) (io.Reader, error)
+	Format(object []any) (io.Reader, error)
 }