Prepare being able to correctly add recipies in 11.x branch

[leymannx]

1. In extras.installer-types section add drupal-recipe:

           "installer-types": [
               "bower-asset",
               "drupal-recipe",
               "npm-asset"
           ],

2. In extra.installer-paths section add "web/recipes/contrib/{$name}": ["type:drupal-recipe"]:

               "web/recipes/contrib/{$name}": [
                   ["type:drupal-recipe"]
               ]

3. Add extra.drupal-recipe section:

           "drupal-recipe": {
               "unpack-remove-recipe": true,
               "auto-unpack": true
           },

4. Upadte README.

[webflo]

I think its not required to add it to installer-types. Its defined as composer installer already in https://github.com/composer/installers/blob/main/src/Composer/Installers/DrupalInstaller.php

[AlexSkrypnyk]

As per this commit, the recipes directory should be located above the web root.

[szeidler]

@webflo + @AlexSkrypnyk are right.

installer-types is obsolete and coming from composer/installers. It's just working.

installer-paths is only required if you want to place recipes not directly in /recipes, but for example a /recipes/contrib folder as @leymannx suggested. Since root is the recommendation it would be

            "recipes/contrib/{$name}": [
                ["type:drupal-recipe"]
            ]

Unpacking on the other hand is depending on the results of https://www.drupal.org/project/distributions_recipes/issues/3355485 or if you use https://github.com/woredeyonas/Drupal-Recipe-Unpack

[AlexSkrypnyk]

@leymannx
I'm closing this one as no changes are required. Please feel free to re-open.