Adjust visual tests CSS import path + Fix assets path

Signed-off-by: Raimund Schlüßler <raimund.schluessler@mailbox.org>

Author: raimund-schluessler

.github/workflows/server-styling-update.yml

@@ -14,7 +14,7 @@ jobs:
 
       - name: Download css
         run: |
-          cd styleguide/assets
+          cd docs/.vitepress/theme/assets
           # Fix img css import
           curl https://nextcloud.github.io/server/apps/theming/css/default.css | sed 's|/apps/theming/img|./img|g' > default.css
           # Fix icons and img css import

cypress/visual/NcAppSidebar/NcAppSidebarMixin.js

@@ -26,8 +26,8 @@ import NcAppSidebar from '../../../src/components/NcAppSidebar/NcAppSidebar.vue'
 import NcActionButton from '../../../src/components/NcActionButton/NcActionButton.vue'
 
 // Server CSS styles
-import '../../../styleguide/assets/icons.css'
-import '../../../styleguide/assets/additional.css'
+import '../../../docs/.vitepress/theme/assets/icons.css'
+import '../../../docs/.vitepress/theme/assets/additional.css'
 
 /**
  * We need this custom style because we run the AppSidebar component without a Content component,