WIP: Online mode

[realDragonium]

Hey! Here I am again.

Its not completely working how I want it to yet. But the basic is here. When you have time could you check it out and let me know what you think about it? I'm also seeing some benefits in separating the App.vue and making more components out of it and in starting/controlling the proxy from the web-server. But those should probably be in another PR.

Current problem I know about and which needs to be worked on are:

• making the server restart if you change targetHost
• passing the settings correctly from web to proxy
• trying to make it so that you dont have to relog if you want to join another server if you login with a online account in minecraft self.
• when you login into a online-mode server you see yourself as alexa skin. But other people see you as your normal skin.

Things that already work:

• capable of changing minecraft version on settings page
• joining servers in online-mode
• changing target on settings page
• filling in your login credentials