Add support for BattleEye and EAC runtimes

[h0m3]

Steam launched Proton BattleEye Runtime and Proton EasyAntiCheat Runtime which allow selected anti-cheat protected games to run. But they aren't full proton runtime.

Some research will be necessary to understand how they work. For now they are ignored by protonlaunch

[h0m3]

I'm still researching this topic, but it seems that when you install "Proton BattleEye Runtime" or "Proton EasyAntiCheat Runtime" you're installing a patch to your current versions of proton installed under steam.

In theory should work without any extra steps but i'm still researching if any change need to be made in order to use those runtimes.