Build modified streamline images

The official image from streamline does not currently work for the arm64
platform. As a temporary measure, the source code and docker build scripts
have been lifted from the official images and are used to build locally.

Some additional modifications are made to reduce overall image size, these
are documented in docker/README.md

docker/streamline-src/vendor/psy/psysh/src/Command/ParseCommand.php

@@ -0,0 +1,127 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2023 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Command;
+
+use PhpParser\Node;
+use Psy\Context;
+use Psy\ContextAware;
+use Psy\Input\CodeArgument;
+use Psy\ParserFactory;
+use Psy\VarDumper\Presenter;
+use Psy\VarDumper\PresenterAware;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\VarDumper\Caster\Caster;
+
+/**
+ * Parse PHP code and show the abstract syntax tree.
+ */
+class ParseCommand extends Command implements ContextAware, PresenterAware
+{
+    /**
+     * Context instance (for ContextAware interface).
+     *
+     * @var Context
+     */
+    protected $context;
+
+    private $presenter;
+    private $parser;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __construct($name = null)
+    {
+        $this->parser = (new ParserFactory())->createParser();
+
+        parent::__construct($name);
+    }
+
+    /**
+     * ContextAware interface.
+     *
+     * @param Context $context
+     */
+    public function setContext(Context $context)
+    {
+        $this->context = $context;
+    }
+
+    /**
+     * PresenterAware interface.
+     *
+     * @param Presenter $presenter
+     */
+    public function setPresenter(Presenter $presenter)
+    {
+        $this->presenter = clone $presenter;
+        $this->presenter->addCasters([
+            Node::class => function (Node $node, array $a) {
+                $a = [
+                    Caster::PREFIX_VIRTUAL.'type'       => $node->getType(),
+                    Caster::PREFIX_VIRTUAL.'attributes' => $node->getAttributes(),
+                ];
+
+                foreach ($node->getSubNodeNames() as $name) {
+                    $a[Caster::PREFIX_VIRTUAL.$name] = $node->$name;
+                }
+
+                return $a;
+            },
+        ]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function configure()
+    {
+        $this
+            ->setName('parse')
+            ->setDefinition([
+            new CodeArgument('code', CodeArgument::REQUIRED, 'PHP code to parse.'),
+            new InputOption('depth', '', InputOption::VALUE_REQUIRED, 'Depth to parse.', 10),
+        ])
+            ->setDescription('Parse PHP code and show the abstract syntax tree.')
+            ->setHelp(
+                <<<'HELP'
+Parse PHP code and show the abstract syntax tree.
+
+This command is used in the development of PsySH. Given a string of PHP code,
+it pretty-prints the PHP Parser parse tree.
+
+See https://github.com/nikic/PHP-Parser
+
+It prolly won't be super useful for most of you, but it's here if you want to play.
+HELP
+            );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $code = $input->getArgument('code');
+        $parserKind = $input->getOption('kind');
+        $depth = $input->getOption('depth');
+
+        $nodes = $this->parser->parse($code);
+        $output->page($this->presenter->present($nodes, $depth));
+
+        $this->context->setReturnValue($nodes);
+
+        return 0;
+    }
+}