feat: introduce some helpers for overlay actions

Author: chase-crumbaugh

pkg/overlay/utils.go

@@ -0,0 +1,19 @@
+package overlay
+
+import (
+	"fmt"
+	"gopkg.in/yaml.v3"
+)
+
+func NewTargetSelector(path, method string) string {
+	return fmt.Sprintf(`$["paths"]["%s"]["%s"]`, path, method)
+}
+
+func NewUpdateAction(path, method string, update yaml.Node) Action {
+	target := NewTargetSelector(path, method)
+
+	return Action{
+		Target: target,
+		Update: update,
+	}
+}