Create Plugin Action for Recipes to check for installed default provider

I also added some new documentation for all things recipes and AI module.

I have discussed this with @thejimbirch and @phenaproxima and there is not clear solution to this - this is obviously a workaround, so I will not merge this until we have a good solution in recipes/drupal core for this or they confirm that there will not be a solution for recipes.

Will review this in detail

Read through the MR, I like the idea and agree that we do need a way to check for a provider being set up and/or the different models being set up.

One thing that we're thinking about for the amazee.ai provider is to have a hidden feature flag, something like "redirect_to_auth_if_not_setup" which would do as described, redirect the user (check has access to configure the provider) to the provider settings page after login.

In the sense that if you install the module via a recipe, and then boot up the site, you would get redirected (as admin) to the provider settings page to login/authenticate the provider.

I will try to test the MR with a modified recipe (of the ai_provider_amazeeio_recipe) to test out how it looks and feels.

Tested this with a new Drupal site.

I used this issue's MR for the AI module and grabbed the ai_provider_amazeeio_recipe then edited the recipe.yml to include a check for the provider.

Test Steps

# drop the DB
drush sql-drop -y

# install drupal based on config, note none of the ai modules/providers are in core.extension.yml
drush si --existing-config -y

# test the recipe
drush recipe ../recipes/ai_provider_amazeeio_recipe

For a failing test, I checked that openai was attempted to be set up with this in the recipe.yml
(note: minified recipe.yml, config.actions has other things and not just ai.settings)

config:
  actions:
    ai.settings:
      verifySetupAi:
        provider_is_setup:
          - openai

For a passing test, I checked that amazeeio was set up with this in the recipe.yml

config:
  actions:
    ai.settings:
      verifySetupAi:
        provider_is_setup:
          - amazeeio