Playground blueprint: Nav overlays, WXR import, Site Editor landing

nav-overlays-site-editor-simple.json

{
  "$schema": "https://playground.wordpress.net/blueprint-schema.json",
  "meta": {
    "title": "Navigation Block with Hash Links & Customizable Overlays",
    "description": "Testing Navigation Block with Hash Links. Uses Gutenberg branch with navigation overlays enabled by default.",
    "author": "automattic"
  },
  "landingPage": "/wp-admin/site-editor.php?canvas=edit",
  "preferredVersions": {
    "php": "latest",
    "wp": "latest"
  },
  "features": {
    "networking": true
  },
  "login": true,
  "steps": [
    {
      "step": "writeFile",
      "path": "/wordpress/wp-content/mu-plugins/rewrite.php",
      "data": "<?php /* Use pretty permalinks */ add_action( 'after_setup_theme', function() { global $wp_rewrite; $wp_rewrite->set_permalink_structure('/%postname%/'); $wp_rewrite->flush_rules(); } );"
    },
    {
      "step": "importWxr",
      "file": {
        "resource": "url",
        "url": "https://gist.githubusercontent.com/getdave/e84eac020209dd575a3ff7c1b655636b/raw/"
      }
    },
    {
      "step": "runPHP",
      "code": "<?php\nrequire '/wordpress/wp-load.php';\n\n$post_content = '<!-- wp:navigation-link {\"label\":\"Home\",\"url\":\"/\",\"kind\":\"custom\"} /--><!-- wp:navigation-link {\"label\":\"About\",\"url\":\"/about\",\"kind\":\"custom\"} /--><!-- wp:navigation-submenu {\"label\":\"Projects\",\"url\":\"/projects\",\"kind\":\"custom\"} --><!-- wp:navigation-link {\"label\":\"Project 1\",\"url\":\"/projects/project-1\",\"kind\":\"custom\"} /--><!-- wp:navigation-link {\"label\":\"Project 2\",\"url\":\"/projects/project-2\",\"kind\":\"custom\"} /--><!-- wp:navigation-link {\"label\":\"Project 3\",\"url\":\"/projects/project-3\",\"kind\":\"custom\"} /--><!-- wp:navigation-link {\"label\":\"Project 4\",\"url\":\"/projects/project-4\",\"kind\":\"custom\"} /--><!-- wp:navigation-link {\"label\":\"Project 5\",\"url\":\"/projects/project-5\",\"kind\":\"custom\"} /--><!-- /wp:navigation-submenu --><!-- wp:navigation-link {\"label\":\"Contact\",\"url\":\"/contact\",\"kind\":\"custom\"} /-->';\n\nwp_insert_post(array(\n    'post_type' => 'wp_navigation',\n    'post_title' => 'Test Navigation Menu',\n    'post_status' => 'publish',\n    'post_content' => $post_content\n));\n"
    }
  ]
}