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

integration/overlay.go

@@ -7,11 +7,10 @@ import (
 	"strings"
 	"sync"
 	"unicode/utf8"
-
 	"github.com/charmbracelet/lipgloss"
+	"github.com/versenilvis/iris/internal/config"
+	"github.com/versenilvis/iris/internal/logger"
 	"github.com/versenilvis/iris/spec"
-	"github.com/versenilvis/iris/config"
-	"github.com/versenilvis/iris/logger"
 	"golang.org/x/term"
 )