Make API connection info configurable

[maxbartunik]

The information passed to Telegram regarding system version etc. on connection is user-facing in most Telegram clients. It is therefore highly desireable to be able to pass the actual device model, app version, language etc. during connection.

Telega/Telega/Connect/TgConnectionEstablisher.cs

Lines 52 to 63 in 9dde766

	var request = new InitConnection<GetConfig, Config>(
	apiId: session.Get().ApiId,
	appVersion: "1.0.0",
	deviceModel: "PC",
	langCode: "en",
	query: config,
	systemVersion: "Win 10.0",
	systemLangCode: "en",
	langPack: "tdesktop",
	proxy: null,
	@params: null
	);

Currently fixed presets are used.

[ilyalatt]

Hello. It was planned. There is a roadmap issue #57. There is f/next branch with desired interface. But the problem is that I abandoned the project refactoring for now. It's pretty messy in f/next. Things should be much better after the refactoring is done. I do not expect to work on the project for a few months for sure. I would be happy if you're interested in contributing.

[maxbartunik]

OK, I will wait then for now ;)