Adapter repository checker

This is a code for frontend and back-end of the service https://adapter-check.iobroker.in/

If you want to add your adapter to the public iobroker repository, all tests on this page must be OK.

Todo

• check if not onlyWWW, then show warnings if www, widgtes directories are found
• Adapters, that have only widgets, should start with vis-
• Do not allow too long news, max 20 entries in io-package.json
• width and height of the logo must be equal and be greater than 32 and less than 512