DEP Swap out simple theme for the new startup theme (#384)

.cow.json

@@ -3,8 +3,7 @@
   "child-stability-inherit": true,
   "dependency-constraint": "loose",
   "vendors": [
-    "silverstripe",
-    "silverstripe-themes"
+    "silverstripe"
   ],
   "tests": [
     "vendor/bin/phpunit vendor/silverstripe/framework/tests/php",

.gitignore

@@ -3,6 +3,6 @@
 /silverstripe-cache/
 /.env
 /vendor/
-/themes/simple/
+/themes/startup-theme/
 /_resources/
 /public/_resources/

README.md

@@ -3,7 +3,7 @@
 [![CI](https://github.com/silverstripe/silverstripe-installer/actions/workflows/ci.yml/badge.svg)](https://github.com/silverstripe/silverstripe-installer/actions/workflows/ci.yml)
 [![Silverstripe supported module](https://img.shields.io/badge/silverstripe-supported-0071C4.svg)](https://www.silverstripe.org/software/addons/silverstripe-commercially-supported-module-list/)
 
-Base project folder for a Silverstripe ([http://silverstripe.org](http://silverstripe.org)) installation. Required modules are installed via [http://github.com/silverstripe/recipe-cms](http://github.com/silverstripe/recipe-cms). For information on how to change the dependencies in a recipe, please have a look at [https://github.com/silverstripe/recipe-plugin](https://github.com/silverstripe/recipe-plugin). In addition, installer includes [theme/simple](https://github.com/silverstripe-themes/silverstripe-simple) as a default theme.
+Base project folder for a Silverstripe ([http://silverstripe.org](http://silverstripe.org)) installation. Required modules are installed via [http://github.com/silverstripe/recipe-cms](http://github.com/silverstripe/recipe-cms). For information on how to change the dependencies in a recipe, please have a look at [https://github.com/silverstripe/recipe-plugin](https://github.com/silverstripe/recipe-plugin). In addition, installer includes [silverstripe/startup-theme](https://github.com/silverstripe/startup-theme) as a default theme.
 
 ## Installation
 

app/_config/theme.yml

@@ -4,5 +4,5 @@ Name: mytheme
 SilverStripe\View\SSViewer:
   themes:
     - '$public'
-    - 'simple'
+    - 'startup-theme'
     - '$default'

composer.json

@@ -8,7 +8,7 @@
         "silverstripe/recipe-plugin": "2.0.x-dev",
         "silverstripe/vendor-plugin": "3.0.x-dev",
         "silverstripe/recipe-cms": "6.0.x-dev",
-        "silverstripe-themes/simple": "3.3.x-dev",
+        "silverstripe/startup-theme": "1.0.x-dev",
         "silverstripe/login-forms": "6.0.x-dev"
     },
     "require-dev": {