✨ feat: fs add new helper method: assertIsExists

Author: inhere

src/FileSystem.php

@@ -260,6 +260,16 @@ public static function assertIsDir(string $dirPath): void
         }
     }
 
+    /**
+     * @param string $path
+     */
+    public static function assertIsExists(string $path): void
+    {
+        if (!file_exists($path)) {
+            throw new InvalidArgumentException("No such file or directory: $path");
+        }
+    }
+
     /**
      * @param string $file file or dir path
      * @param string $type allow: file, dir, link