Disable the default /node listing view and add a better default front page for new installs

Problem/Motivation

In #3159848: [Policy] Always install Drupal with Standard on the UI, pared down of use case specific elements (content types, node listing, commenting, theme) we are planning to remove the standard install profile and merge it with minimal to create a starter recipe. One thing that's not in the standard profile but assumes the intent of the standard profile is the default /node listing in node module, which is created as a view. This is present on Drupal sites even if they don't intend to have a simple blog like listing and some people forget to remove it or disable it.

Steps to reproduce

Install with the standard profile before and after this MR :)

Proposed resolution

• Disable the /node default listing. (Removing it would be very tricky due to lots of test dependencies)
• Rename this view from Frontpage to Promoted content.
• Add a controller that's a welcome page and set that as the front page.
  • Name the page welcome-to-drupal so it is not in the way later on even when it is not available anymore. (A more generic welcome route could conflict even with existing sites).
  • Add text on that page based on Olivero's getting started page that tells you to set a new front page with a link to the config for it.
  • Access to that routes depends on whether this path is the front page or not. It should 404 when this is not the front page anymore.. So it practically disappears when the front page is configured.
• Update all the tests to explicitly enable the promoted content view where they need it. Most tests also need a route rebuild so the routes become available.
• Update the Olivero nightwatch tests to test the front page instead of the /node page because the long text now appears on the front page (for testing scrolling).

Remaining tasks

Review!

User interface changes

1. New default front page in the standard profile is not a node listing but a welcome page. (Minimal still has user/login as the front page)
2. Promoted content view available as disabled, don't need to disable it if you don't want to use it.

BEFORE:

AFTER:

Introduced terminology

None.

API changes

None.

Data model changes

None.

Release notes snippet

The default node listing page is not the default frontpage of Drupal's standard profile anymore. The view providing this page (and a default RSS feed) is still available but is disabled by default.

LLM disclosure

LLM was used to accelerate the development of this MR, everything was deeply reviewed though.