feat: port influx setup from influxdb (#35)

internal/stdio/stdio.go

@@ -0,0 +1,12 @@
+package stdio
+
+import "io"
+
+type StdIO interface {
+	io.Writer
+	Banner(message string) error
+	Error(message string) error
+	GetStringInput(prompt, defaultValue string) (string, error)
+	GetPassword(prompt string, minLen int) (string, error)
+	GetConfirm(prompt string) bool
+}