Multi-platform Tray Indicator

Please see the examples as documentation is currently lacking.

Tray Indicator uses icons from gresources on Linux and .rc-files on Windows.
These recourses have to be packed into be final binary.

• [x] Linux
• [x] Windows
• [x] MacOS*

* MacOS does not allow running applications in threads other than main, meaning that it is not possible to listen on events in a new thread. See the macos.rs example for a how-to.

Todo:

• [ ] Docs