Localization support

[Lordmau5]

Right now the UI only supports English, both ingame and for stream chats (or Twitch polls).

A rough first idea would probably be to have a native en_US.json file packaged with the executable so it can always be read.

Then allow loading an overwrite file which will take priority for the strings if they're present, so it doesn't actually have to be the WHOLE file.

Additionally, allowing effects to be different for the UI, ingame and stream (e.g. Twitch chat and polls) is good, too.

Something like

{
	"effects": {
		"infinite_ammo": {
			"game": "Infinite Ammo",
			"ui": "Infinite Ammo",
			"stream": "Infinite Ammo"
		},
		"hold_the_f_up": {
			"game": "Hold The F Up...",
			"ui": "Hold The F Up...",
			"stream": "Hold The F*** Up..."
		},
	}
}

[gromchek]

A rough first idea would probably be to have a native en_US.json file packaged with the executable so it can always be read.

It would be a simple solution and easy to contribute.
Something like a key-value file where key is GUI tool localization key and value is translated string.