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/CodeCleaner/NamespaceAwarePass.php

@@ -0,0 +1,85 @@
+<?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\CodeCleaner;
+
+use PhpParser\Node;
+use PhpParser\Node\Name;
+use PhpParser\Node\Name\FullyQualified as FullyQualifiedName;
+use PhpParser\Node\Stmt\Namespace_;
+
+/**
+ * Abstract namespace-aware code cleaner pass.
+ */
+abstract class NamespaceAwarePass extends CodeCleanerPass
+{
+    protected $namespace;
+    protected $currentScope;
+
+    /**
+     * @todo should this be final? Extending classes should be sure to either
+     * use afterTraverse or call parent::beforeTraverse() when overloading.
+     *
+     * Reset the namespace and the current scope before beginning analysis
+     *
+     * @return Node[]|null Array of nodes
+     */
+    public function beforeTraverse(array $nodes)
+    {
+        $this->namespace = [];
+        $this->currentScope = [];
+    }
+
+    /**
+     * @todo should this be final? Extending classes should be sure to either use
+     * leaveNode or call parent::enterNode() when overloading
+     *
+     * @param Node $node
+     *
+     * @return int|Node|null Replacement node (or special return value)
+     */
+    public function enterNode(Node $node)
+    {
+        if ($node instanceof Namespace_) {
+            $this->namespace = isset($node->name) ? $this->getParts($node->name) : [];
+        }
+    }
+
+    /**
+     * Get a fully-qualified name (class, function, interface, etc).
+     *
+     * @param mixed $name
+     */
+    protected function getFullyQualifiedName($name): string
+    {
+        if ($name instanceof FullyQualifiedName) {
+            return \implode('\\', $this->getParts($name));
+        }
+
+        if ($name instanceof Name) {
+            $name = $this->getParts($name);
+        } elseif (!\is_array($name)) {
+            $name = [$name];
+        }
+
+        return \implode('\\', \array_merge($this->namespace, $name));
+    }
+
+    /**
+     * Backwards compatibility shim for PHP-Parser 4.x.
+     *
+     * At some point we might want to make $namespace a plain string, to match how Name works?
+     */
+    protected function getParts(Name $name): array
+    {
+        return \method_exists($name, 'getParts') ? $name->getParts() : $name->parts;
+    }
+}