refactor(pkg): merge pkg/utils into pkg/util

Consolidate pure helper packages under pkg/util and update imports.

pkg/util/string.go

@@ -0,0 +1,12 @@
+package util
+
+import "strings"
+
+// TrimStringFields trims leading and trailing spaces from all provided string pointers.
+func TrimStringFields(fields ...*string) {
+	for _, f := range fields {
+		if f != nil {
+			*f = strings.TrimSpace(*f)
+		}
+	}
+}