Modules should support . placeholder

[rainerhahnekamp]

Modules usually have just one feature or a special API folder which is exposed to the outside. So we want to have a nested structure like:

holidays:
  - holiday.ts
  - ui
    - ui1.ts
    - ui2.ts
  - model
    - holiday-model.ts
    - countries.ts
  - internal
    - holiday.logic.ts

In this scenario, assigned tags to holiday.ts is complicated:

{
  modules: {
    'holidays': ['domain:holidays', 'type:feature'],
    'holidays:<type>': ['domain:holidays', 'type:<type>'],
  }
}

It would be much better, if we could

{
  modules: {
    'holidays': {
      '.': ['domain:holidays'],
      '.': ['domain:holidays', 'type:<type>'],
    }
  }
}