Module deprecations

This feature introduces module deprecations. The syntax is the following:

{
  "general": {
    "url": "https://...",
    "deprecated": {
      "since": "2022-11-14",
      "removal": "2022-12-31",
      "superseded_by": {
        "new/module/which/replaces/this": {}
      },
      "message": "This module has been replaced/moved/... by something else"
    }
  },

  "...": {
  
  }
}

The only mandatory fields are since and message.

This MR only strikes deprecated modules in the info view:

Another MR will make this feature more useful.