Use internal function to check for arguments exclusivity

Because it has a better error message than the cobra-provided one:

  Can't use the following flags together: --quiet, --verbose

Instead of:

  Error: if any flags in the group [quiet verbose] are set none of the others can be; [quiet verbose] were all set

Author: cmaglie

internal/cli/compile/compile.go

@@ -85,6 +85,9 @@ func NewCommand(srv rpc.ArduinoCoreServiceServer, settings *rpc.Configuration) *
 			"  " + os.Args[0] + ` compile -b arduino:avr:uno --build-property "build.extra_flags=-DPIN=2 \"-DMY_DEFINE=\"hello world\"\"" /home/user/Arduino/MySketch` + "\n" +
 			"  " + os.Args[0] + ` compile -b arduino:avr:uno --build-property build.extra_flags=-DPIN=2 --build-property "compiler.cpp.extra_flags=\"-DSSID=\"hello world\"\"" /home/user/Arduino/MySketch` + "\n",
 		Args: cobra.MaximumNArgs(1),
+		PreRun: func(cmd *cobra.Command, args []string) {
+			arguments.CheckFlagsConflicts(cmd, "quiet", "verbose")
+		},
 		Run: func(cmd *cobra.Command, args []string) {
 			if cmd.Flag("build-cache-path").Changed {
 				feedback.Warning(i18n.Tr("The flag --build-cache-path has been deprecated. Please use just --build-path alone or configure the build cache path in the Arduino CLI settings."))
@@ -117,7 +120,6 @@ func NewCommand(srv rpc.ArduinoCoreServiceServer, settings *rpc.Configuration) *
 		i18n.Tr(`Optional, can be: %s. Used to tell gcc which warning level to use (-W flag).`, "none, default, more, all"))
 	compileCommand.Flags().BoolVarP(&verbose, "verbose", "v", false, i18n.Tr("Optional, turns on verbose mode."))
 	compileCommand.Flags().BoolVarP(&quiet, "quiet", "q", false, i18n.Tr("Optional, suppresses almost every output."))
-	compileCommand.MarkFlagsMutuallyExclusive("quiet", "verbose")
 	compileCommand.Flags().BoolVarP(&uploadAfterCompile, "upload", "u", false, i18n.Tr("Upload the binary after the compilation."))
 	portArgs.AddToCommand(compileCommand, srv)
 	compileCommand.Flags().BoolVarP(&verify, "verify", "t", false, i18n.Tr("Verify uploaded binary after the upload."))