Hardware support tags

[avivace]

Add tags exposing the support of the entry for particular hardware. See #121 for an example of homebrew making use of GB Camera.

I already added gbprinter..

• What else could be added there? GB Camera?
• Should those tags be "classified" as "hardware-support" ones so they can be filtered better?

[reini1305]

Could you add the gbprinter tag also to game-schema-d3.json? scripts/validate.py uses that to check the schema against all game.jsons

[avivace]

Could you add the gbprinter tag also to game-schema-d3.json? scripts/validate.py uses that to check the schema against all game.jsons

The draft3 should remain frozen as we are introducing breaking changes with draft4. I'll update the scripts to start using the draft4 as json schema.

[dag7dev]

gbprinter and gbcamera should be enough. In GBA would be useful tilt for games that uses tilt function and e-reader too.

What about additional-hardware-support instead of a generic hardware-support?