nexus-client's file hierarchy overhaul

src/client_exam/utils/go.mod

-module nexus-client/utils
-
-go 1.18

src/client_exam/utils/utils.go

-package utils
-
-import (
-	"fmt"
-	"os"
-)
-
-func Print(a ...any) {
-	os.Stdout.WriteString(fmt.Sprint(a ...))
-}
-
-func Println(a ...any) {
-	Print(a...)
-	Print("\n")
-}
-
-func PrintErr(a ...any) {
-	os.Stderr.WriteString(fmt.Sprint(a ...))
-}
-
-func PrintlnErr(a ...any) {
-	PrintErr(a...)
-	PrintErr("\n")
-}
-
-// Returns true if the specified file exists, false otherwise.
-func FileExists(filename string) bool {
-	info, err := os.Stat(filename)
-	if os.IsNotExist(err) {
-	   return false
-	}
-	return !info.IsDir()
-}