chore: move all pkg to internal

Author: etilite

builder/builder.go renamed to internal/builder/builder.go

@@ -3,7 +3,7 @@ package http
 import (
 	"net/http"
 
-	"github.com/etilite/xlsx-builder/builder"
+	"github.com/etilite/xlsx-builder/internal/builder"
 	"github.com/etilite/xlsx-builder/internal/model/invoice"
 	"github.com/etilite/xlsx-builder/internal/model/table"
 )

builder/builder_test.go renamed to internal/builder/builder_test.go

@@ -5,8 +5,8 @@ import (
 	"os/signal"
 	"syscall"
 
-	"github.com/etilite/xlsx-builder/delivery/http"
 	"github.com/etilite/xlsx-builder/internal/config"
+	"github.com/etilite/xlsx-builder/internal/delivery/http"
 )
 
 func main() {