refactor: better project structure (#35)

This project is starting to grow, and I've seen flaws in the initial
project structure design
I think I'll restructure the entire project directory for better
scalability and also cleaner

root/root.go

@@ -15,8 +15,8 @@ import (
 
 	"github.com/spf13/cobra"
 	_ "github.com/versenilvis/iris/commands"
-	"github.com/versenilvis/iris/config"
-	"github.com/versenilvis/iris/logger"
+	"github.com/versenilvis/iris/internal/config"
+	"github.com/versenilvis/iris/internal/logger"
 	"golang.org/x/term"
 )