refactor: add MergeMaps utility

Author: jooola

internal/util/maps.go

@@ -0,0 +1,13 @@
+package util
+
+import (
+	"maps"
+)
+
+func MergeMaps[M ~map[K]V, K comparable, V any](items ...M) M {
+	acc := make(M)
+	for _, item := range items {
+		maps.Copy(acc, item)
+	}
+	return acc
+}