Import latest app updates from streamline

An updated set of source files and initialization was provided by streamline to
address issues observed during initial testing. These files have been updated in
order to generate a new set of app images.

docker/streamline-src/vendor/league/flysystem/src/PathPrefixer.php

@@ -1,50 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace League\Flysystem;
-
-use function rtrim;
-use function strlen;
-use function substr;
-
-final class PathPrefixer
-{
-    private string $prefix = '';
-
-    public function __construct(string $prefix, private string $separator = '/')
-    {
-        $this->prefix = rtrim($prefix, '\\/');
-
-        if ($this->prefix !== '' || $prefix === $separator) {
-            $this->prefix .= $separator;
-        }
-    }
-
-    public function prefixPath(string $path): string
-    {
-        return $this->prefix . ltrim($path, '\\/');
-    }
-
-    public function stripPrefix(string $path): string
-    {
-        /* @var string */
-        return substr($path, strlen($this->prefix));
-    }
-
-    public function stripDirectoryPrefix(string $path): string
-    {
-        return rtrim($this->stripPrefix($path), '\\/');
-    }
-
-    public function prefixDirectoryPath(string $path): string
-    {
-        $prefixedPath = $this->prefixPath(rtrim($path, '\\/'));
-
-        if ($prefixedPath === '' || substr($prefixedPath, -1) === $this->separator) {
-            return $prefixedPath;
-        }
-
-        return $prefixedPath . $this->separator;
-    }
-}