Implemented basic system

vendor/github.com/manifoldco/promptui/keycodes.go

@@ -0,0 +1,25 @@
+// +build !windows
+
+package promptui
+
+import "github.com/chzyer/readline"
+
+var (
+	// KeyEnter is the default key for submission/selection
+	KeyEnter rune = readline.CharEnter
+
+	// KeyBackspace is the default key for deleting input text
+	KeyBackspace rune = readline.CharBackspace
+
+	// KeyPrev is the default key to go up during selection
+	KeyPrev rune = readline.CharPrev
+
+	// KeyNext is the default key to go down during selection
+	KeyNext rune = readline.CharNext
+
+	// KeyBackward is the default key to page up during selection
+	KeyBackward rune = readline.CharBackward
+
+	// KeyForward is the default key to page down during selection
+	KeyForward rune = readline.CharForward
+)