feat: configuration for showing additional sub generator tiles on the…

[alex-gilin]

… main page

Sub generators tiles in Template Wizard.

If you want to show tile for sub generator you should add the following configuration in the package.json in the main generator:

"additional_generators": [ { 
   "namespace": "@namespace/dummy:adaptation-project",   // should be the namespace of the sub generator
   "displayName": "Sub Generator Tile",   // is used for the name in the tile
   "description": "Sub generator description",  // is used for the description in the tile
   "homePage": "https://home.page", 
   "image": "image.png"   // icon in tile of the sub generator
} ]

credit to @GDamyanov