Getting the basic wiring of the importer over into Livewire

WIP: Wiring up more and more of the actions on the importer

Files now upload okay, a little glitchy on the display-side though

add to readmes so i dont forget

app/Models/Setting.php

@@ -217,7 +217,7 @@ class Setting extends Model
      *
      * @author Mogilev Arseny
      */
-    public static function fileSizeConvert($bytes): string
+    public static function fileSizeConvert(int $bytes): string
     {
         $result = 0;
         $bytes = floatval($bytes);
@@ -244,6 +244,7 @@ class Setting extends Model
                 ],
             ];
 
+        $result = $bytes; // handles the zero case
         foreach ($arBytes as $arItem) {
             if ($bytes >= $arItem['VALUE']) {
                 $result = $bytes / $arItem['VALUE'];