refactor to decouple commands form entrypoint for reusability and centralizing commands.

Increase reusability and composition

pkg/repl/options.go

@@ -0,0 +1,22 @@
+package repl
+
+import "github.com/c-bata/go-prompt"
+
+const PromptPrefix = "> "
+const OptionMaxSuggestions = 5
+
+// promptOptions returns a slice of prompt.Option
+// to configure the behavior and appearance of the REPL prompt.
+func promptOptions(history []string) []prompt.Option {
+	return []prompt.Option{
+		prompt.OptionPrefixTextColor(prompt.Cyan),
+		prompt.OptionMaxSuggestion(OptionMaxSuggestions),
+		prompt.OptionSuggestionBGColor(prompt.DefaultColor),
+		prompt.OptionSelectedSuggestionBGColor(prompt.DefaultColor),
+		prompt.OptionDescriptionBGColor(prompt.DefaultColor),
+		prompt.OptionSelectedDescriptionBGColor(prompt.DefaultColor),
+		prompt.OptionPreviewSuggestionBGColor(prompt.DefaultColor),
+		prompt.OptionScrollbarBGColor(prompt.DefaultColor),
+		prompt.OptionHistory(history),
+	}
+}