refactor: split utility functions into utils and helpers

utils/collection.go

@@ -0,0 +1,21 @@
+package utils
+
+import "strings"
+
+func SubSlice[T any](slice []T, from, to uint) []T {
+	if int(to) > len(slice) {
+		to = uint(len(slice))
+	}
+	return slice[from:int(to)]
+}
+
+func CloneStringMap(m map[string]string, keysToLower bool) map[string]string {
+	m2 := make(map[string]string)
+	for k, v := range m {
+		if keysToLower {
+			k = strings.ToLower(k)
+		}
+		m2[k] = v
+	}
+	return m2
+}