move config package under cli

Author: masci

commands/config/config.go renamed to cli/config/config.go

@@ -25,13 +25,13 @@ import (
 	"github.com/arduino/arduino-cli/cli"
 	"github.com/arduino/arduino-cli/cli/board"
 	"github.com/arduino/arduino-cli/cli/compile"
+	"github.com/arduino/arduino-cli/cli/config"
 	"github.com/arduino/arduino-cli/cli/core"
 	"github.com/arduino/arduino-cli/cli/daemon"
 	"github.com/arduino/arduino-cli/cli/lib"
 	"github.com/arduino/arduino-cli/cli/sketch"
 	"github.com/arduino/arduino-cli/cli/upload"
 	"github.com/arduino/arduino-cli/cli/version"
-	"github.com/arduino/arduino-cli/commands/config"
 	"github.com/arduino/arduino-cli/commands/generatedocs"
 	"github.com/arduino/arduino-cli/common/formatter"
 	"github.com/arduino/arduino-cli/configs"